Update CHANGELOG-EE.md for 12.0.7-ee

[ci skip]

CHANGELOG-EE.md

@@ -274,6 +274,15 @@ Please view this file on the master branch, on stable branches it's out of date.
 - Don't send CI usage email notifications for self-hosted instances. !14809
+## 12.0.7
+
+### Security (3 changes)
+
+- Limit number of jobs in running pipelines for the past hour on per plan basis. !1182
+- Queries for Upload should be scoped by model.
+- Filter out old system notes for epics in notes api endpoint response.
+
+
 ## 12.0.6
 - No changes.