fix lint in ReactJs demo

Author: GoodDayForSurf

apps/demos/Demos/FileUploader/FileUploading/ReactJs/index.js

@@ -1,5 +1,6 @@
 import React from 'react';
 import ReactDOM from 'react-dom';
+// eslint-disable-next-line import/no-unresolved
 import 'anti-forgery';
 import App from './App.js';