Removing the vec file extension from INDEX_STORE_HYBRID_NIO_EXTENSION…

…S, to ensure the no performance degradation for vector search via Lucene Engine. (opensearch-project#9528)

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

CHANGELOG.md

@@ -162,6 +162,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - Add instrumentation in rest and network layer. ([#9415](https://github.com/opensearch-project/OpenSearch/pull/9415))
 - Improve performance of encoding composite keys in multi-term aggregations ([#9412](https://github.com/opensearch-project/OpenSearch/pull/9412))
 - Fix sort related ITs for concurrent search ([#9177](https://github.com/opensearch-project/OpenSearch/pull/9466)
+- Removing the vec file extension from INDEX_STORE_HYBRID_NIO_EXTENSIONS, to ensure the no performance degradation for vector search via Lucene Engine.([#9528](https://github.com/opensearch-project/OpenSearch/pull/9528)))
 
 ### Deprecated