Update CHANGELOG

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CHANGELOG

@@ -6,6 +6,10 @@ v 8.6.0 (unreleased)
   - Strip leading and trailing spaces in URL validator (evuez)
   - Update documentation to reflect Guest role not being enforced on internal projects
+v 8.5.2
+  - Fix sidebar overlapping content when screen width was below 1200px
+  - Fix error 500 when commenting on a commit
+
 v 8.5.1
   - Fix group projects styles
   - Show Crowd login tab when sign in is disabled and Crowd is enabled (Peter Hudec)
@@ -25,9 +29,6 @@ v 8.5.1
   - Update sentry-raven gem to 0.15.6
   - Add build coverage in project's builds page (Steffen Köhler)
-v 8.5.2
-  - Fix error 500 when commenting on a commit
-
 v 8.5.0
   - Fix duplicate "me" in tooltip of the "thumbsup" awards Emoji (Stan Hu)
   - Cache various Repository methods to improve performance (Yorick Peterse)