Add 8.13.5 CHANGELOG

[ci skip]
Signed-off-by: Rémy Coutable <remy@rymai.me>

CHANGELOG.md

 Please view this file on the master branch, on stable branches it's out of date.
 
+## 8.13.5 (2016-11-08)
+
+- Restore unauthenticated access to public container registries
+
 ## 8.13.4 (2016-11-07)
 
 - Fix showing pipeline status for a given commit from correct branch. !7034

changelogs/unreleased/unauthenticated-container-registry-access.yml

----
-title: Restore unauthenticated access to public container registries
-merge_request: 
-author: