Use assumeImmutableResults when starting the MR Show page Status Box

app/assets/javascripts/pages/projects/merge_requests/init_merge_request_show.js

@@ -29,7 +29,10 @@ export default function initMergeRequestShow() {
   }
 
   const el = document.querySelector('.js-mr-status-box');
-  const apolloProvider = new VueApollo({ defaultClient: createDefaultClient() });
+  const apolloProvider = new VueApollo({
+    assumeImmutableResults: true,
+    defaultClient: createDefaultClient(),
+  });
   // eslint-disable-next-line no-new
   new Vue({
     el,