Fix CHANGELOG.

CHANGELOG

 Please view this file on the master branch, on stable branches it's out of date.
 
-v 8.12.1 (unreleased)
+v 8.12.2 (unreleased)
+
+v 8.12.1
   - Fix a memory leak in HTML::Pipeline::SanitizationFilter::WHITELIST
+  - Fix issue with search filter labels not displaying
 
 v 8.12.0
   - Update the rouge gem to 2.0.6, which adds highlighting support for JSX, Prometheus, and others. !6251
@@ -49,7 +52,6 @@ v 8.12.0
   - Fix file permissions change when updating a file on the Gitlab UI !5979
   - Added horizontal padding on build page sidebar on code coverage block. !6196 (Vitaly Baev)
   - Change merge_error column from string to text type
-  - Fix issue with search filter labels not displaying
   - Reduce contributions calendar data payload (ClemMakesApps)
   - Show all pipelines for merge requests even from discarded commits !6414
   - Replace contributions calendar timezone payload with dates (ClemMakesApps)