Update README.md

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README.md

@@ -2,6 +2,8 @@
 
 This demo has been deployed at this [link](https://plotters-rs.github.io/wasm-demo/www/index.html).
 
+## Try this example locally
+
 To build the demo you need [wasm-pack](https://rustwasm.github.io/docs/book/game-of-life/setup.html).
 
 Then you can run it locally either using `npm` and `webpack-dev-server` or