test(rails): allow adapter serialization overhead

Author: solnic

sentry-rails/spec/active_job/test_adapter_spec.rb

@@ -26,7 +26,6 @@ def perform; end
       untraced_count = last_enqueued_payload["serialization_count"]
       within_parent_transaction { custom_job.perform_later }
 
-      expect(untraced_count).to eq(1)
       expect(last_enqueued_payload["serialization_count"]).to eq(untraced_count)
     end
   end