wrong variable name

Playground/js/mainWebGPU.js

@@ -154,9 +154,9 @@ compileAndRun = function(parent, fpsLabel) {
                     }
 
                     // Update FPS if camera is not a webxr camera
-                    if(!(sceneToRender.activeCamera && 
-                        sceneToRender.activeCamera.getClassName && 
-                        sceneToRender.activeCamera.getClassName() === 'WebXRCamera')) {
+                    if(!(scene.activeCamera && 
+                        scene.activeCamera.getClassName && 
+                        scene.activeCamera.getClassName() === 'WebXRCamera')) {
                         fpsLabel.innerHTML = engine.getFps().toFixed() + " fps";
                     }
                 }.bind(this));