[release] update CHANGELOG for android v5.2.1

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: jaeopt

CHANGELOG.md

@@ -6,8 +6,7 @@ May 28, 2026
 ### Fixes
 
 - Upgrade dependency to [Java SDK 4.4.1](https://github.com/optimizely/java-sdk/releases/tag/v4.4.1)
-  - Block ODP identify event for single identifier ([#629](https://github.com/optimizely/java-sdk/pull/629))
-  - Add local holdouts support ([#628](https://github.com/optimizely/java-sdk/pull/628))
+  - Block ODP identify event for single identifier
 
 ## 5.2.0
 May 8, 2026