add HashRouter for live demo

Author: Artem-K-Koltunov

samples/react-chat-ui-kit-demo-app/src/index.tsx

@@ -1,6 +1,6 @@
 import React from 'react';
 import ReactDOM from 'react-dom/client';
-import { BrowserRouter } from 'react-router-dom';
+import {HashRouter} from 'react-router-dom';
 import './index.scss';
 import App from './App';
 import reportWebVitals from './reportWebVitals';
@@ -10,9 +10,9 @@ const root = ReactDOM.createRoot(
 );
 root.render(
   <React.StrictMode>
-      <BrowserRouter>
+      <HashRouter>
           <App />
-      </BrowserRouter>
+      </HashRouter>
   </React.StrictMode>
 );