Update RELEASE.CHANGELOG.md (#1769)

Author: 96malhar

RELEASE.CHANGELOG.md

@@ -1,3 +1,7 @@
+### Release 2024-06-21
+* **Amazon.Lambda.Templates (7.2.0)**
+  * Updated Amazon.Lambda.Annotations dependency to 1.5.0 in the Message Processing Framework template. Added the `SQSEvent` attribute to set up SQS event source mapping for the message handler Lambda function.
+
 ### Release 2024-06-17
 * **Amazon.Lambda.Annotations (1.5.0)**
   * Added new .NET attribute to create SQS event source mapping for Lambda functions.