Update builder2.html

builder2.html

@@ -6,7 +6,7 @@
     <link rel="stylesheet" href="https://unpkg.com/grapesjs/dist/css/grapes.min.css">
     <script src="https://unpkg.com/grapesjs"></script>
     <script src="https://unpkg.com/grapesjs-plugin-forms"></script>
-    <script src="path/to/grapesjs-custom-code.min.js"></script>
+    <script src="https://unpkg.com/grapesjs-custom-code"></script>
     <style>
       body, html {
         height: 100%;