Minor typo correction (#743)

Co-authored-by: Ross Coundon <ross.coundon@leadent.digital>

README.md

@@ -831,7 +831,7 @@ EC2
 ### EC2 Basics
 
 -	📒 [Homepage](https://aws.amazon.com/ec2/) ∙ [Documentation](https://aws.amazon.com/documentation/ec2/) ∙ [FAQ](https://aws.amazon.com/ec2/faqs/) ∙ [Pricing](https://aws.amazon.com/ec2/pricing/) (see also [ec2instances.info](http://www.ec2instances.info/)\)
--	**EC2** (Elastic Compute Cloud) is AWS’ offering of the most fundamental piece of cloud computing: A [virtual private server](https://en.wikipedia.org/wiki/Virtual_private_server). These “instances” can run [most Linux, BSD, and Windows operating systems](https://aws.amazon.com/ec2/faqs/#What_operating_system_environments_are_supported). Internally, they've used a heavily modified [Xen](https://en.wikipedia.org/wiki/Xen) virtualization. That said, new instance classes are being introduced with a KVM derived hypervisor instead, called [Nitro](http://www.brendangregg.com/blog/2017-11-29/aws-ec2-virtualization-2017.html). So far, this is limited to the C5 and M5 instance types. Lastly, there's a "bare metal hypervisor" available for [i3.metal instances](https://aws.amazon.com/about-aws/whats-new/2018/05/announcing-general-availability-of-amazon-ec2-bare-metal-instances/)   
+-	**EC2** (Elastic Compute Cloud) is AWS’ offering of the most fundamental piece of cloud computing: A [virtual private server](https://en.wikipedia.org/wiki/Virtual_private_server). These “instances” can run [most Linux, BSD, and Windows operating systems](https://aws.amazon.com/ec2/faqs/#What_operating_system_environments_are_supported). Internally, they've used a heavily modified [Xen](https://en.wikipedia.org/wiki/Xen) virtualization. That said, new instance classes are being introduced with a KVM derived hypervisor instead, called [Nitro](http://www.brendangregg.com/blog/2017-11-29/aws-ec2-virtualization-2017.html). So far, this is limited to the C5 and M5 instance types. Lastly, there's a "bare metal hypervisor" available for [i3.metal instances](https://aws.amazon.com/about-aws/whats-new/2018/05/announcing-general-availability-of-amazon-ec2-bare-metal-instances/)
 -	The term “EC2” is sometimes used to refer to the servers themselves, but technically refers more broadly to a whole collection of supporting services, too, like load balancing (CLBs/ALBs/NLBs), IP addresses (EIPs), bootable images (AMIs), security groups, and network drives (EBS) (which we discuss individually in this guide).
 -	**💸[EC2 pricing](https://aws.amazon.com/ec2/pricing/)** and **[cost management](#ec2-cost-management)** is a complicated topic. It can range from free (on the [AWS free tier](https://aws.amazon.com/free/)) to a lot, depending on your usage. Pricing is by instance type, by second or hour, and changes depending on AWS region and whether you are purchasing your instances [On-Demand](https://aws.amazon.com/ec2/pricing/on-demand/), on the [Spot market](https://aws.amazon.com/ec2/spot/) or pre-purchasing ([Reserved Instances](https://aws.amazon.com/ec2/pricing/reserved-instances/)).
 - **Network Performance:** For some instance types, AWS uses general terms like Low, Medium, and High to refer to network performance. Users have done [benchmarking](http://stackoverflow.com/questions/18507405/ec2-instance-typess-exact-network-performance) to provide expectations for what these terms can mean.
@@ -1218,7 +1218,7 @@ Glacier
 -	**Glacier** is a lower-cost alternative to S3 when data is infrequently accessed, such as for archival purposes.
 -	It’s only useful for data that is rarely accessed. It generally takes [3-5 hours](https://aws.amazon.com/glacier/faqs/#dataretrievals) to fulfill a retrieval request.
 -	AWS [has not officially revealed](https://en.wikipedia.org/wiki/Amazon_Glacier#Storage) the storage media used by Glacier; it may be low-spin hard drives or even tapes.
--	AWS has released an even more cost effective storate tier called [Glacier Deep Archive](https://aws.amazon.com/blogs/aws/new-amazon-s3-storage-class-glacier-deep-archive/) that offers ~12 hour retrieval latencies, but costs roughly a thousand dollars per month per petabyte. 
+-	AWS has released an even more cost effective storate tier called [Glacier Deep Archive](https://aws.amazon.com/blogs/aws/new-amazon-s3-storage-class-glacier-deep-archive/) that offers ~12 hour retrieval latencies, but costs roughly a thousand dollars per month per petabyte.
 
 ### Glacier Tips
 
@@ -1574,7 +1574,7 @@ Lambda
 
 ### Lambda Alternatives and Lock-in
 
--	🚪Other clouds offer similar services with different names, including [Google Cloud Functions](https://cloud.google.com/functions/), [Azure Functions](https://azure.microsoft.com/en-us/services/functions/), and [IBM OpenWhisk](http://www.ibm.com/cloud-computing/bluemix/openwhisk/). Also if your are running Kubernetes another Lambda alternative is [OpenFaaS](https://github.com/openfaas/faas)
+-	🚪Other clouds offer similar services with different names, including [Google Cloud Functions](https://cloud.google.com/functions/), [Azure Functions](https://azure.microsoft.com/en-us/services/functions/), and [IBM OpenWhisk](http://www.ibm.com/cloud-computing/bluemix/openwhisk/). Also if you are running Kubernetes another Lambda alternative is [OpenFaaS](https://github.com/openfaas/faas)
 
 ### Lambda Gotchas and Limitations
 
@@ -2141,7 +2141,7 @@ Certificate Manager
 - 📒 [Homepage](https://aws.amazon.com/certificate-manager/) ∙ [User guide](http://docs.aws.amazon.com/acm/latest/userguide/acm-overview.html) ∙ [FAQ](https://aws.amazon.com/certificate-manager/faqs/) ∙ [Pricing](https://aws.amazon.com/certificate-manager/pricing/)
 - Use the **Certificate Manager** to manage SSL/TLS certificates in other AWS services.
 - Supports importing existing certificates as well as issuing new ones.
-- Provides Domain Validated (DV) certificates. [Validation](http://docs.aws.amazon.com/acm/latest/userguide/gs-acm-validate.html) can be done in two ways. The first (and recommended) way is [via DNS](https://docs.aws.amazon.com/acm/latest/userguide/gs-acm-validate-dns.html). If the zone lives within Route 53 and the user has access, the necessary record can be added in the console via a single click during the certificate request process. If the zone is not within Route 53 the user is required to update DNS manually. This is still preferred to the second way, which requires more user interaction, and is done by sending an email to 3 contact addresses in WHOIS and 5 common addresses for the domain, for each domain name present in the request.  
+- Provides Domain Validated (DV) certificates. [Validation](http://docs.aws.amazon.com/acm/latest/userguide/gs-acm-validate.html) can be done in two ways. The first (and recommended) way is [via DNS](https://docs.aws.amazon.com/acm/latest/userguide/gs-acm-validate-dns.html). If the zone lives within Route 53 and the user has access, the necessary record can be added in the console via a single click during the certificate request process. If the zone is not within Route 53 the user is required to update DNS manually. This is still preferred to the second way, which requires more user interaction, and is done by sending an email to 3 contact addresses in WHOIS and 5 common addresses for the domain, for each domain name present in the request.
 - ACM will attempt to automatically [renew](http://docs.aws.amazon.com/acm/latest/userguide/how-domain-validation-works.html) a certificate issued by Amazon. It will first attempt to connect to the domain on HTTPS and check that the certificate used by the domain is the same with the certificate that it intends to renew. Failing that, it will check the DNS record used previously for validation. Failing that, ACM will attempt manual validation by sending emails to all domains in the certificate.
 
 ### Certificate Manager Alternatives and Lock-in