chore(example): fix gh-pages demo having wring import path

Author: Timo Bechtel

example/index.html

@@ -40,7 +40,7 @@
     <h1>Example Chat</h1>
     <div id="container"></div>
     <script type="module">
-      import { observe } from '../src/index.js';
+      import { observe } from './dist/index.module.js';
       const container = document.getElementById('container');
       observe(container);