Adds 1.3.16.0 release notes (#4263)

Signed-off-by: Darshit Chanpura <[email protected]>

release-notes/opensearch-security.release-notes-1.3.16.0.md

@@ -0,0 +1,13 @@
+## Version 1.3.16.0
+
+Compatible with OpenSearch 1.3.16
+
+### Bug Fixes
+
+* Allow TransportConfigUpdateAction when security config initialization has completed ([#4115](https://github.com/opensearch-project/security/pull/4115))
+
+### Maintenance
+
+* Force resolution of org.apache.zookeeper:zookeeper to 3.9.2 and org.bitbucket.b_c:jose4j to 0.9.4 ([#4136](https://github.com/opensearch-project/security/pull/4136))
+* Integration Tests for Security Config Initialization ([#4134](https://github.com/opensearch-project/security/pull/4134))
+* Remove and refactor console print statements ([#4206](https://github.com/opensearch-project/security/pull/4206))