Update CHANGELOG.md for 12.3.3

[ci skip]

CHANGELOG.md

@@ -2,6 +2,13 @@
 documentation](doc/development/changelog.md) for instructions on adding your own
 entry.
+## 12.3.3
+
+### Security (1 change)
+
+- Fix private feature Elasticsearch leak.
+
+
 ## 12.3.2
 ### Security (10 changes)

changelogs/unreleased/security-29491.yml

----
-title: Fix private feature Elasticsearch leak
-merge_request:
-author:
-type: security