Fix import react-dom

Author: compulim

__tests__/html2/simple/fatModule/esm.sh/supportPolymiddleware.reactDOMRender.withCreateRoot.html

@@ -22,7 +22,7 @@
       import { createDirectLine, createStoreWithOptions, hooks, ReactWebChat } from 'botframework-webchat';
       import { activityComponent, createActivityPolymiddleware } from 'botframework-webchat/middleware';
       import { createElement } from 'react';
-      import { createRoot } from 'react-dom';
+      import { createRoot } from 'react-dom/client';
 
       const { useStyleOptions } = hooks;
       const {