update changelog

Signed-off-by: Nicholas Walter Knize <[email protected]>

Author: nknize

CHANGELOG.md

@@ -173,6 +173,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - Add safeguard limits for file cache during node level allocation ([#8208](https://github.com/opensearch-project/OpenSearch/pull/8208))
 - Move span actions to Scope ([#8411](https://github.com/opensearch-project/OpenSearch/pull/8411))
 - Add wrapper tracer implementation ([#8565](https://github.com/opensearch-project/OpenSearch/pull/8565))
+- [Refactor] MediaTypeParser to MediaTypeParserRegistry ([#8636](https://github.com/opensearch-project/OpenSearch/pull/8636))
 
 ### Deprecated