Update aws-s3-source.md (#4966)

Author: cameroneckles

docs/send-data/hosted-collectors/amazon-aws/aws-s3-source.md

@@ -63,11 +63,13 @@ When you create an Amazon Source, you add it to a Hosted Collector. Before creat
 
 Cisco Umbrella offers logging to a Cisco-managed S3 bucket. Collection from these buckets has the following limitations:
 
-* AWS versioned APIs are not supported. The **Use AWS versioned APIs** setting on the Source must be disabled.
-* S3 Event Notifications Integration is not supported.
+* AWS versioned APIs are not supported. The **Use AWS versioned APIs** setting on the Source must be disabled.
+* S3 Event Notifications Integration is not supported, so you cannot use an SNS subscription endpoint.
 * Access must be provided with an Access ID and Key. Role-based access is not supported.
 * Use a prefix in the path expression so it doesn't point to the root directory.
-* Ensure that your path expression ends in `/*`. Otherwise, you will get a ListBucket error. For example: `s3://cisco-managed-us-east-1/PREFIX/*`
+* Ensure that your path expression ends in `/*`. Otherwise, you will get a ListBucket error. For example:
+  * Bucket Name: `cisco-managed-us-east-1`
+  * Path Expression: `987654321_12e34c..../*`
 
 ## S3 Event Notifications Integration