Updated service API models for release.

Author: AWS SDK for Ruby

CHANGELOG.md

@@ -1,6 +1,14 @@
 Unreleased Changes
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+* Feature - Aws::Chime - Updated the API, and documentation for Amazon Chime.
+
+* Feature - Aws::Comprehend - Updated the API, and documentation for Amazon Comprehend.
+
+* Feature - Aws::EC2 - Updated the API, and documentation for Amazon Elastic Compute Cloud.
+
+* Feature - Aws::StorageGateway - Updated the API, and documentation for AWS Storage Gateway.
+
 2.11.273 (2019-05-13)
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