Update index.html

public/index.html

@@ -4,7 +4,7 @@
   <meta charset="UTF-8">
   <meta name="viewport"
         content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
-  <title>Tetrahedron Demo</title>
+  <title>Basic Geometries Demo</title>
 
   <!-- three.js -->
   <script src="https://unpkg.com/three@0.126.0/build/three.js"></script>
@@ -13,7 +13,7 @@
 
 <!-- Starting an immersive WebXR session requires user interaction.
     We start this one with a simple button. -->
-<button onclick="activateXR()">Start Tetrahedron</button>
+<button onclick="activateXR()">Start Static Geometries</button>
 <script>
 async function activateXR() {
   // Add a canvas element and initialize a WebGL context that is compatible with WebXR.