Update dash

tutorials/device-dashboard/minimal/dashboard.html

@@ -5,7 +5,7 @@
     <meta name="viewport" content="width=device-width, initial-scale=1" />
     <title>LED Control Dashboard</title>
 
-    <script src="https://cdn.jsdelivr.net/gh/cesanta/mongoose@master/resources/dashboard.js"></script>
+    <script src="https://mongoose.ws/resources/dashboard.js"></script>
     <script>
       Dashboard.init({
         debug: true,