Add 8.5.2 items in CHANGELOG

[ci skip]

CHANGELOG

@@ -13,12 +13,20 @@ v 8.6.0 (unreleased)
 
 v 8.5.2
   - Fix sidebar overlapping content when screen width was below 1200px
-  - Fix permissions for deprecated CI build status badge
+  - Don't repeat labels listed on Labels tab
+  - Bring the "branded appearance" feature from EE to CE
   - Fix error 500 when commenting on a commit
+  - Show days remaining instead of elapsed time for Milestone
   - Fix broken icons on installations with relative URL (Artem Sidorenko)
+  - Fix issue where tag list wasn't refreshed after deleting a tag
   - Fix import from gitlab.com (KazSawada)
+  - Improve implementation to check read access to forks and add pagination
+  - Don't show any "2FA required" message if it's not actually required
   - Fix help keyboard shortcut on relative URL setups (Artem Sidorenko)
+  - Update Rails to 4.2.5.2
+  - Fix permissions for deprecated CI build status badge
   - Don't show "Welcome to GitLab" when the search didn't return any projects
+  - Add Todos documentation
 
 v 8.5.1
   - Fix group projects styles