Update CHANGELOG

CHANGELOG

 Please view this file on the master branch, on stable branches it's out of date.
 
 v 8.9.0 (unreleased)
+  - Bulk assign/unassign labels to issues.
   - Allow enabling wiki page events from Webhook management UI
   - Make EmailsOnPushWorker use Sidekiq mailers queue
   - Fix wiki page events' webhook to point to the wiki repository
@@ -74,7 +75,6 @@ v 8.8.2
   - Fixed issue with enter key selecting wrong option in dropdown. !4210
   - When creating a .gitignore file a dropdown with templates will be provided. !4075
   - Fix concurrent request when updating build log in browser. !4183
-  - Bulk assign/unassign labels to issues.
 
 v 8.8.1
   - Add documentation for the "Health Check" feature
@@ -165,7 +165,6 @@ v 8.7.6
   - Fix import from GitLab.com to a private instance failure. !4181
   - Fix external imports not finding the import data. !4106
   - Fix notification delay when changing status of an issue
-  - Bulk assign/unassign labels to issues.
 
 v 8.7.5
   - Fix relative links in wiki pages. !4050