Update CHANGELOG.md for 13.4.7+ee.0

[ci skip]

CHANGELOG.md

@@ -3,6 +3,15 @@
 The latest version of this file can be found at the master branch of the
 omnibus-gitlab repository.
+## 13.4.7 (2020-12-07)
+
+### Security (3 changes)
+
+- Update GnuPG to version 2.2.23.
+- Update libxml2 to version 2.9.10.
+- Update GraphicsMagick to 1.3.35 and patch PNG vulnerability.
+
+
 ## 13.4.6 (2020-11-03)
 ### Fixed (1 change)

changelogs/unreleased/5643-confidential-issue.yml

----
-title: Update GnuPG to version 2.2.23
-merge_request:
-author:
-type: security

changelogs/unreleased/5644-confidential-issue.yml

----
-title: Update libxml2 to version 2.9.10
-merge_request:
-author:
-type: security

changelogs/unreleased/security-graphicsmagick-update-master.yml

----
-title: Update GraphicsMagick to 1.3.35 and patch PNG vulnerability
-merge_request:
-author:
-type: security