Update CHANGELOG-EE.md for 12.1.2-ee

[ci skip]

CHANGELOG-EE.md

@@ -2,6 +2,10 @@ Please view this file on the master branch, on stable branches it's out of date.
 ## 12.1.2
+### Security (1 change)
+
+- Ensure the Insights configuration project is part of the group and is accessible to the current user.
+
 ### Security (6 changes)
 - Don't override approval rules if not allowed.

ee/changelogs/unreleased/security-rc-insights-unallowed-private-project-usage.yml

----
-title: Ensure the Insights configuration project is part of the group and is accessible to the current user
-merge_request:
-author:
-type: security