Added to change log

CHANGELOG.md

@@ -10,7 +10,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - Allow mmap to use new JDK-19 preview APIs in Apache Lucene 9.4+ ([#5151](https://github.com/opensearch-project/OpenSearch/pull/5151))
 - Add events correlation engine plugin ([#6854](https://github.com/opensearch-project/OpenSearch/issues/6854))
 - Add support for ignoring missing Javadoc on generated code using annotation ([#7604](https://github.com/opensearch-project/OpenSearch/pull/7604))
-
+- Added server version as response header [#6583](https://github.com/opensearch-project/OpenSearch/issues/6583)
 ### Dependencies
 - Bump `log4j-core` from 2.18.0 to 2.19.0
 - Bump `forbiddenapis` from 3.3 to 3.4
@@ -154,4 +154,4 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 ### Security
 
 [Unreleased 3.0]: https://github.com/opensearch-project/OpenSearch/compare/2.x...HEAD
-[Unreleased 2.x]: https://github.com/opensearch-project/OpenSearch/compare/2.7...2.x
+[Unreleased 2.x]: https://github.com/opensearch-project/OpenSearch/compare/2.7...2.x