add example

README.md

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 This webapp allows users to edit hardware settings for Razer gaming laptops in Linux using the [WebHID API](https://developer.mozilla.org/en-US/docs/Web/API/WebHID_API). 
 
+It is free to use at https://www.rzrctrl.com/. 
+
+https://github.com/Razer-Linux/RazerControl/assets/51272568/982d8a77-779a-4853-8968-1da692e0f8b5
+
 ### Contributing
 
 To run locally, you can use `npm run start`.