Update public/index.html

public/index.html

@@ -121,7 +121,7 @@
 
       const loader = new THREE.GLTFLoader();
       let reticle;
-      loader.load("https://immersive-web.github.io/webxr-samples/media/gltf/reticle/reticle.gltf", function(gltf) {
+      loader.load("https://github.com/KhronosGroup/glTF-Sample-Models/blob/main/1.0/Avocado/glTF/Avocado.gltf", function(gltf) {
         reticle = gltf.scene;
         reticle.visible = false;
         scene.add(reticle);