modify changelog

Signed-off-by: Ruirui Zhang <mariazrr@amazon.com>

Author: ruai0511

CHANGELOG.md

@@ -10,6 +10,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - Apply the date histogram rewrite optimization to range aggregation ([#13865](https://github.com/opensearch-project/OpenSearch/pull/13865))
 - [Writable Warm] Add composite directory implementation and integrate it with FileCache ([12782](https://github.com/opensearch-project/OpenSearch/pull/12782))
 - [Workload Management] Add QueryGroup schema ([13669](https://github.com/opensearch-project/OpenSearch/pull/13669))
+- [Workload Management] Add Delete QueryGroup API Logic ([#14735](https://github.com/opensearch-project/OpenSearch/pull/14735))
 - Add batching supported processor base type AbstractBatchingProcessor ([#14554](https://github.com/opensearch-project/OpenSearch/pull/14554))
 - Fix race condition while parsing derived fields from search definition ([14445](https://github.com/opensearch-project/OpenSearch/pull/14445))
 - Add allowlist setting for ingest-common and search-pipeline-common processors ([#14439](https://github.com/opensearch-project/OpenSearch/issues/14439))