test: Silence Karma warning over node:stream from RTS (#4660)

Author: rschristian

compat/test/browser/textarea.test.js

@@ -1,5 +1,5 @@
 import React, { render, hydrate, useState } from 'preact/compat';
-import ReactDOMServer from 'preact/compat/server';
+import ReactDOMServer from 'preact/compat/server.browser.js';
 import { setupScratch, teardown } from '../../../test/_util/helpers';
 import { act } from 'preact/test-utils';