Updated changelog

Signed-off-by: Owais Kazi <[email protected]>

Author: owaiskazi19

CHANGELOG.md

@@ -128,6 +128,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
  - Enforce type safety for RegisterTransportActionsRequest([#4796](https://github.com/opensearch-project/OpenSearch/pull/4796))
  - Modified local node request to return Discovery Node ([#4862](https://github.com/opensearch-project/OpenSearch/pull/4862))
  - Enforce type safety for NamedWriteableRegistryParseRequest ([#4923](https://github.com/opensearch-project/OpenSearch/pull/4923))
+ - Added default constructor for JSON parsing using Jackson ([#5369](https://github.com/opensearch-project/OpenSearch/pull/5369))
 
 ## [Unreleased 2.x]
 ### Added