update html

src/demo/templates/demo/index.html

@@ -348,6 +348,8 @@ FONTS & ICONS
 	<link rel="stylesheet" href="https://cdn.staticfile.org/twitter-bootstrap/3.3.7/css/bootstrap.min.css">
 	<script src="https://cdn.staticfile.org/twitter-bootstrap/3.3.7/js/bootstrap.min.js"></script>
 <![endif]-->
+
+<script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
 </head>