Add 2.15.0 release notes (#1738) (#1744)

Add release note and prepare changelog for next release

Signed-off-by: Vijayan Balasubramanian <balasvij@amazon.com>
(cherry picked from commit 34a8b4f)

Co-authored-by: Vijayan Balasubramanian <balasvij@amazon.com>

CHANGELOG.md

@@ -12,17 +12,10 @@ 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/k-NN/compare/2.14...2.x)
+## [Unreleased 2.x](https://github.com/opensearch-project/k-NN/compare/2.15...2.x)
 ### Features
-* Use the Lucene Distance Calculation Function in Script Scoring for doing exact search [#1699](https://github.com/opensearch-project/k-NN/pull/1699)
 ### Enhancements
-* Add KnnCircuitBreakerException and modify exception message [#1688](https://github.com/opensearch-project/k-NN/pull/1688)
-* Add stats for radial search [#1684](https://github.com/opensearch-project/k-NN/pull/1684)
-* Support script score when doc value is disabled and fix misusing DISI [#1696](https://github.com/opensearch-project/k-NN/pull/1696)
-* Add validation for pq m parameter before training starts [#1713](https://github.com/opensearch-project/k-NN/pull/1713)
 ### Bug Fixes
-* Block commas in model description [#1692](https://github.com/opensearch-project/k-NN/pull/1692)
-* Update threshold value after new result is added [#1715](https://github.com/opensearch-project/k-NN/pull/1715)
 ### Infrastructure
 ### Documentation
 ### Maintenance

release-notes/opensearch-knn.release-notes-2.15.0.0.md

@@ -0,0 +1,14 @@
+## Version 2.15.0.0 Release Notes
+
+Compatible with OpenSearch 2.15.0
+
+### Features
+* Use the Lucene Distance Calculation Function in Script Scoring for doing exact search [#1699](https://github.com/opensearch-project/k-NN/pull/1699)
+### Enhancements
+* Add KnnCircuitBreakerException and modify exception message [#1688](https://github.com/opensearch-project/k-NN/pull/1688)
+* Add stats for radial search [#1684](https://github.com/opensearch-project/k-NN/pull/1684)
+* Support script score when doc value is disabled and fix misusing DISI [#1696](https://github.com/opensearch-project/k-NN/pull/1696)
+* Add validation for pq m parameter before training starts [#1713](https://github.com/opensearch-project/k-NN/pull/1713)
+### Bug Fixes
+* Block commas in model description [#1692](https://github.com/opensearch-project/k-NN/pull/1692)
+* Update threshold value after new result is added [#1715](https://github.com/opensearch-project/k-NN/pull/1715)