update example

resources/assets/js/bootstrap.js

@@ -40,6 +40,8 @@ window.axios.defaults.headers.common = {
 
 // import Echo from "laravel-echo"
 
+// window.Pusher = require('pusher-js');
+
 // window.Echo = new Echo({
 //     broadcaster: 'pusher',
 //     key: 'your-pusher-key'