Update ErrorModal.js

Author: Sonakshis

Section 9/code/03-working-with-portals/src/components/UI/ErrorModal.js

@@ -1,5 +1,5 @@
 import React from 'react';
-import ReactDOM from 'react-dom/client';
+import ReactDOM from 'react-dom';
 
 import Card from './Card';
 import Button from './Button';