Push confidential_notes feature flag to mr frontend

app/controllers/projects/merge_requests_controller.rb

@@ -43,6 +43,7 @@ class Projects::MergeRequestsController < Projects::MergeRequests::ApplicationCo
     push_frontend_feature_flag(:local_file_reviews, default_enabled: :yaml)
     push_frontend_feature_flag(:paginated_notes, @project, default_enabled: :yaml)
     push_frontend_feature_flag(:new_pipelines_table, @project, default_enabled: :yaml)
+    push_frontend_feature_flag(:confidential_notes, @project, default_enabled: :yaml)
 
     record_experiment_user(:invite_members_version_b)
   end

changelogs/unreleased/push_confidential_notes_ff_to_fe.yml

+---
+title: Push confidential_notes feature flag to mr frontend
+merge_request: 56798
+author: Lee Tickett @leetickett
+type: fixed