Update CHANGELOG-EE.md for 12.7.9-ee

[ci skip]

CHANGELOG-EE.md

@@ -305,6 +305,13 @@ Please view this file on the master branch, on stable branches it's out of date.
 - Prepare DB structure for GMA forking changes. !22002
 
 
+## 12.7.9 (2020-04-14)
+
+### Security (1 change)
+
+- Fix filename bypass when uploading NuGet packages.
+
+
 ## 12.7.5
 
 ### Fixed (1 change)

ee/changelogs/unreleased/security-fix-issue-213040.yml

----
-title: Fix filename bypass when uploading NuGet packages
-merge_request:
-author:
-type: security