Add 'glTF-Binary/BoomBox.glb' to example list.

examples/webgl_loader_gltf2.html

@@ -373,7 +373,7 @@
 					cameraPos: new THREE.Vector3(2, 1, 3),
 					objectRotation: new THREE.Euler(0, Math.PI, 0),
 					addLights:true,
-					extensions: ["glTF"]
+					extensions: ["glTF", "glTF-Binary"]
 				}
 			];