UX: Add label for delete own post button in review queue (#28991)

app/models/reviewable_queued_post.rb

@@ -73,7 +73,9 @@ class ReviewableQueuedPost < Reviewable
       end
     end
 
-    actions.add(:delete) if guardian.can_delete?(self)
+    actions.add(:delete) do |a|
+      a.label = "reviewables.actions.delete_single.title"
+    end if guardian.can_delete?(self)
   end
 
   def build_editable_fields(fields, guardian, args)