Update index.html

index.html

@@ -32,6 +32,8 @@
         @apply underline hover:text-blue-500 hover:no-underline;
       }
     </style>
+    <script src="https://cdnjs.cloudflare.com/ajax/libs/iframe-resizer/4.3.1/iframeResizer.contentWindow.min.js"></script>
+
     <script src="https://cdn.tailwindcss.com"></script>
     <script type="module">
       import snarkdown from "https://cdn.skypack.dev/snarkdown";