Update CHANGELOG

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CHANGELOG

@@ -11,10 +11,10 @@ v 8.4.0 (unreleased)
   - Add CAS support (tduehr)
   - Add link to merge request on build detail page
   - Revert back upvote and downvote button to the issue and MR pages
-  - Enable "Add key" button when user fills in a proper key (Stan Hu)
 v 8.3.3 (unreleased)
   - Fix project transfer e-mail sending incorrect paths in e-mail notification (Stan Hu)
+  - Enable "Add key" button when user fills in a proper key (Stan Hu)
 v 8.3.2
   - Disable --follow in `git log` to avoid loading duplicate commit data in infinite scroll (Stan Hu)