Add missing import path to multiple viewpoints example

examples/multiple-viewpoints/index.html

@@ -17,6 +17,7 @@
     {
       "imports": {
         "three": "/examples/js/vendor/three/build/three.module.js",
+        "three/addons/": "/examples/js/vendor/three/examples/jsm/",
         "@forge-gfx/forge": "/dist/forge.module.js"
       }
     }
@@ -24,7 +25,8 @@
   <script type="module">
     import * as THREE from "three";
     import { ForgeRenderer, ForgeViewpoint, SplatMesh } from "@forge-gfx/forge";
-    import { GLTFLoader } from 'three/addons/loaders/GLTFLoader.js';
+
+    import { GLTFLoader } from "three/addons/loaders/GLTFLoader.js";
     import { getAssetFileURL } from "/examples/js/get-asset-url.js";
 
     const scene = new THREE.Scene();