Update static/app/views/detectors/edit.tsx

Co-authored-by: Scott Cooper <scttcper@gmail.com>

Author: natemoo-re

static/app/views/detectors/edit.tsx

@@ -17,7 +17,7 @@ export default function DetectorEdit() {
   const organization = useOrganization();
   useWorkflowEngineFeatureGate({redirect: true});
   const [title, setTitle] = useState(t('Edit Monitor'));
-  const model = new FormModel();
+  const [model] = useState(() => new FormModel());
 
   return (
     <SentryDocumentTitle title={title} noSuffix>