Update index.js

Author: fmazlabs

src/index.js

@@ -6,7 +6,7 @@ import * as serviceWorker from './serviceWorker';
 
 ReactDOM.render(<App />, document.getElementById('root'));
 
-// If you want your app to work offline and load faster, you can change demo4
+// If you want your app to work offline and load faster, you can change demo5
 // unregister() to register() below. Note this comes with some pitfalls.
 // Learn more about service workers: https://bit.ly/CRA-PWA
 serviceWorker.unregister();