Resolve a FOSS spec failure

app/controllers/projects/merge_requests_controller.rb

@@ -83,8 +83,7 @@ class Projects::MergeRequestsController < Projects::MergeRequests::ApplicationCo
     :ci_environments_status,
     :destroy,
     :rebase,
-    :discussions,
-    :description_diff
+    :discussions
   ]
 
   def index

ee/app/controllers/ee/projects/merge_requests_controller.rb

@@ -33,6 +33,7 @@ module EE
         feature_category :code_review, [:delete_description_version, :description_diff]
 
         urgency :high, [:delete_description_version]
+        urgency :low, [:description_diff]
       end
 
       def can_run_sast_experiments_on?(project)