Update CHANGELOG entry

Signed-off-by: Craig Perkins <cwperx@amazon.com>

Author: cwperks

CHANGELOG.md

@@ -16,7 +16,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 ### Deprecated
 
 ### Removed
-- Remove banner about bwc tests being disabled on mac ([#18983](https://github.com/opensearch-project/OpenSearch/pull/18983))
+- 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))