FIX: Transaction in UserAnonymizer prevented avatar from updating

spec/services/user_merger_spec.rb

@@ -1009,7 +1009,10 @@ describe UserMerger do
   it "updates the username" do
     Jobs::UpdateUsername.any_instance
       .expects(:execute)
-      .with(user_id: source_user.id, old_username: 'alice1', new_username: 'alice')
+      .with(user_id: source_user.id,
+            old_username: 'alice1',
+            new_username: 'alice',
+            avatar_template: target_user.avatar_template)
       .once
 
     merge_users!