Added release notes for 2.10 release

Signed-off-by: Navneet Verma <navneev@amazon.com>

CHANGELOG.md

@@ -12,14 +12,11 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 ### Maintenance
 ### Refactoring
 
-## [Unreleased 2.x](https://github.com/opensearch-project/neural-search/compare/2.7...2.x)
+## [Unreleased 2.x](https://github.com/opensearch-project/neural-search/compare/2.10...2.x)
 ### Features
-* Added Score Normalization and Combination feature ([#241](https://github.com/opensearch-project/neural-search/pull/241/))
 ### Enhancements
-* Changed format for hybrid query results to a single list of scores with delimiter ([#259](https://github.com/opensearch-project/neural-search/pull/259))
-* Added validations for score combination weights in Hybrid Search ([#265](https://github.com/opensearch-project/neural-search/pull/265))
 ### Bug Fixes
 ### Infrastructure
 ### Documentation
 ### Maintenance
-### Refactoring
+### Refactoring

release-notes/opensearch-neural-search.release-notes-2.10.0.0.md

@@ -0,0 +1,11 @@
+## Version 2.10.0.0 Release Notes
+
+Compatible with OpenSearch 2.10.0
+
+### Features
+* Improved Hybrid Search relevancy by Score Normalization and Combination ([#241](https://github.com/opensearch-project/neural-search/pull/241/))
+
+### Enhancements
+* Changed format for hybrid query results to a single list of scores with delimiter ([#259](https://github.com/opensearch-project/neural-search/pull/259))
+* Added validations for score combination weights in Hybrid Search ([#265](https://github.com/opensearch-project/neural-search/pull/265))
+* Made hybrid search active by default ([#274](https://github.com/opensearch-project/neural-search/pull/274))