Update public/webXR.html

public/webXR.html

@@ -35,7 +35,7 @@ const materials = [
 
 // Create the cube and add it to the demo scene.
 const cube = new THREE.Mesh(new THREE.BoxBufferGeometry(0.5, 0.5, 0.5), materials);
-cube.position.set(0, 0, 0.5);
+cube.position.set(0, 0, -1);
 scene.add(cube);
 
 // Set up the WebGLRenderer, which handles rendering to the session's base layer.