Update CHANGELOG.md

Author: kiranprakash154

CHANGELOG.md

@@ -110,6 +110,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - [Tiered caching] Make IndicesRequestCache implementation configurable [EXPERIMENTAL] ([#12533](https://github.com/opensearch-project/OpenSearch/pull/12533))
 - Add kuromoji_completion analyzer and filter ([#4835](https://github.com/opensearch-project/OpenSearch/issues/4835))
 - The org.opensearch.bootstrap.Security should support codebase for JAR files with classifiers ([#12586](https://github.com/opensearch-project/OpenSearch/issues/12586))
+- [Tiered caching] Add Stale keys Management and CacheCleaner to IndicesRequestCache [EXPERIMENTAL] ([#12625](https://github.com/opensearch-project/OpenSearch/pull/12625))
 
 ### Dependencies
 - Bump `peter-evans/find-comment` from 2 to 3 ([#12288](https://github.com/opensearch-project/OpenSearch/pull/12288))