suppress flow error to fix react-native-github/helloworld test

Summary:
Trying to fix https://github.com/facebook/react-native/actions/runs/15194195511/job/42734417752

Changelog: [Internal]

Differential Revision: D75245742

Author: panagosg7

packages/helloworld/__tests__/App.test.jsx

@@ -4,9 +4,11 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
+ * @flow strict-local
  * @format
  */
 
+// $FlowFixMe[untyped-import]
 import App from '../App';
 import React from 'react';
 import ReactTestRenderer from 'react-test-renderer';