S3 - adding note about consistency around the list operation.

README.md

@@ -715,6 +715,7 @@ S3
 	- The uncertainty lies with *when* your clients and other clients see updates.
 	-	**New objects:** If you create a new object, you’ll be able to read it instantly, which is called **read-after-write consistency**.
 		-	Well, with the additional caveat that if you do a read on an object before it exists, then create it, [you get eventual consistency](https://docs.aws.amazon.com/AmazonS3/latest/dev/Introduction.html#ConsistencyModel) (not read-after-write).
+		-	This does not apply to any list operations; newly created objects are [not guaranteed to appear in a list operation right away](https://docs.aws.amazon.com/AmazonS3/latest/dev/Introduction.html#ConsistencyModel)
 	-	**Updates to objects:** If you overwrite or delete an object, you’re only guaranteed **eventual consistency**, i.e. the change will happen but you have no guarantee of when.
 	- 🔹For many use cases, treating S3 objects as **immutable** (i.e. deciding by convention they will be created or deleted but not updated) can greatly simplify the code that uses them, avoiding complex state management.
 	-	🔹Note that [until 2015](https://aws.amazon.com/about-aws/whats-new/2015/08/amazon-s3-introduces-new-usability-enhancements/), 'us-standard' region had had a weaker eventual consistency model, and the other (newer) regions were read-after-write. This was finally corrected — but watch for many old blogs mentioning this!