Update changelog

CHANGELOG

@@ -3,18 +3,12 @@ v 7.6.0
   - New rugged version
   - Add CRON=1 backup setting for quiet backups
   - Fix failing wiki restore
-  -
   - Add optional Sidekiq MemoryKiller middleware (enabled via SIDEKIQ_MAX_RSS env variable)
-  -
-  -
   - Monokai highlighting style now more faithful to original design (Mark Riedesel)
   - Create project with repository in synchrony
   - Added ability to create empty repo or import existing one if project does not have repository
-  -
-  -
   - Reactivate highlight.js language autodetection
   - Mobile UI improvements
-  -
   - Change maximum avatar file size from 100KB to 200KB
   - Strict validation for snippet file names
   - Enable Markdown preview for issues, merge requests, milestones, and notes (Vinnie Okada)
@@ -22,6 +16,11 @@ v 7.6.0
   - Update Sidekiq to version 2.17.8
   - Add author filter to project issues and merge requests pages
   - Atom feed for user activity
+  - Support multiple omniauth providers for the same user
+  - Rendering cross reference in issue title and tooltip for merge request
+  - Show username in comments
+  - Possibility to create Milestones or Labels when Issues are disabled
+  - Fix bug with showing gpg signature in tag
 
 v 7.5.2
   - Don't log Sidekiq arguments by default