Modify change log

Signed-off-by: Binlong Gao <gbinlong@amazon.com>

Author: gaobinlong

CHANGELOG.md

@@ -24,6 +24,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - Fix flaky tests in CloseIndexIT by addressing cluster state synchronization issues ([#18878](https://github.com/opensearch-project/OpenSearch/issues/18878))
 - [Tiered Caching] Handle  query execution exception ([#19000](https://github.com/opensearch-project/OpenSearch/issues/19000))
 - Grant access to testclusters dir for tests ([#19085](https://github.com/opensearch-project/OpenSearch/issues/19085))
+- Fix assertion error when collapsing search results with concurrent segment search enabled ([#19053](https://github.com/opensearch-project/OpenSearch/pull/19053))
 
 ### Dependencies
 - Bump `com.netflix.nebula.ospackage-base` from 12.0.0 to 12.1.0 ([#19019](https://github.com/opensearch-project/OpenSearch/pull/19019))
@@ -42,11 +43,6 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 ### Removed
 - Enable backward compatibility tests on Mac ([#18983](https://github.com/opensearch-project/OpenSearch/pull/18983))
 
-### Fixed
-- Fix flaky tests in CloseIndexIT by addressing cluster state synchronization issues ([#18878](https://github.com/opensearch-project/OpenSearch/issues/18878))
-- [Tiered Caching] Handle  query execution exception ([#19000](https://github.com/opensearch-project/OpenSearch/issues/19000))
-- Fix assertion error when collapsing search results with concurrent segment search enabled ([#19053](https://github.com/opensearch-project/OpenSearch/pull/19053))
-
 ### Security
 
 [Unreleased 3.x]: https://github.com/opensearch-project/OpenSearch/compare/3.1...main