Add changelog

Signed-off-by: Rishab Nahata <[email protected]>

Author: imRishN

CHANGELOG.md

@@ -125,6 +125,7 @@ Inspired from [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 - Fix new race condition in DecommissionControllerTests ([4688](https://github.com/opensearch-project/OpenSearch/pull/4688))
 - Fix SearchStats (de)serialization (caused by https://github.com/opensearch-project/OpenSearch/pull/4616) ([#4697](https://github.com/opensearch-project/OpenSearch/pull/4697))
 - Fixing Gradle warnings associated with publishPluginZipPublicationToXxx tasks ([#4696](https://github.com/opensearch-project/OpenSearch/pull/4696))
+- [BUG]: Remove redundant field from GetDecommissionStateResponse ([#4751](https://github.com/opensearch-project/OpenSearch/pull/4751))
 ### Security
 - CVE-2022-25857 org.yaml:snakeyaml DOS vulnerability ([#4341](https://github.com/opensearch-project/OpenSearch/pull/4341))