update changelog

Signed-off-by: yuye-aws <[email protected]>

CHANGELOG.md

@@ -17,6 +17,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 ### Enhancements
 - Pass empty doc collector instead of top docs collector to improve hybrid query latencies by 20% ([#731](https://github.com/opensearch-project/neural-search/pull/731))
 ### Bug Fixes
+- Fix multi node "no such index" error in text chunking processor ([#713](https://github.com/opensearch-project/neural-search/pull/713))
+- Fix BWC test failure in 2.13.0 in text chunking processor ([#752](https://github.com/opensearch-project/neural-search/pull/752))
 ### Infrastructure
 ### Documentation
 ### Maintenance