Add 1.3.16 release notes (#1156)

* Add 1.3.16 release notes

Signed-off-by: Shreyansh Ray <[email protected]>

* Fix review comments

Signed-off-by: Shreyansh Ray <[email protected]>

---------

Signed-off-by: Shreyansh Ray <[email protected]>

Author: rayshrey

release-notes/opensearch-index-management.release-notes-1.3.16.0.md

@@ -0,0 +1,10 @@
+## Version 1.3.16.0 2024-4-18
+
+Compatible with OpenSearch 1.3.16
+
+### Maintenance
+* Increment version to 1.3.16 ([#1131](https://github.com/opensearch-project/index-management/pull/1131))
+* Force resolve logback deps to mitigate CVE-2023-6378 ([#1125](https://github.com/opensearch-project/index-management/pull/1125))
+
+### Documentation
+* Version 1.3.16 release notes ([#1156](https://github.com/opensearch-project/index-management/pull/1156))