Fixup example README punctuation.
@@ -4,7 +4,7 @@ Uploads a file to S3 given a bucket and object key. Also takes a duration
value to terminate the update if it doesn't complete within that time.
The AWS Region needs to be provided in the AWS shared config or on the
-environment variable as `AWS_REGION`. Credentials also must be provided
+environment variable as `AWS_REGION`. Credentials also must be provided.
Will default to shared config file, but can load from environment if provided.
## Usage:
