Add CHANGELOG

CHANGELOG

@@ -51,6 +51,7 @@ v 8.7.0 (unreleased)
   - Implement 'Groups View' as an option for dashboard preferences !3379 (Elias W.)
   - Better errors handling when creating milestones inside groups
   - Fix high CPU usage when PostReceive receives refs/merge-requests/<id>
+  - Pass before_script, script directly to runner (Kamil Trzciński)
   - Hide `Create a group` help block when creating a new project in a group
   - Implement 'TODOs View' as an option for dashboard preferences !3379 (Elias W.)
   - Allow issues and merge requests to be assigned to the author !2765