Update README.md

Update fiddle link.

README.md

@@ -58,7 +58,7 @@ function animate( time ) {
 }
 ```
 
-If everything goes well, you should see [this](https://jsfiddle.net/2nyxkmco/).
+If everything goes well, you should see [this](https://jsfiddle.net/v98k6oze/).
 
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