Update changelog for 16.3.3

GitLab Release Tools Bot · GitLab Release Tools Bot · commit 26b5df960ea8 · 2023-09-12T14:27:22.000Z
[ci skip]
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -3,6 +3,10 @@
 The latest version of this file can be found at the master branch of the
 omnibus-gitlab repository.
 
+## 16.3.3 (2023-09-12)
+
+No changes.
+
 ## 16.3.2 (2023-09-05)
 
 No changes.
