Update README

Author: adrianmanea

README.md

@@ -2,7 +2,7 @@
 
 ![license](https://img.shields.io/badge/license-MIT-blue.svg)
 
-[![Material Kit - React](https://s3.eu-west-2.amazonaws.com/devias/products/react-material-dashboard/react-material-free-xl.jpg)](https://react-material-dashboard.devias.io/)
+[![Material Kit - React](https://github.com/devias-io/material-kit-react/blob/main/public/static/thumbnail.png)](https://material-kit-react.devias.io/)
 
 > Free React Admin Dashboard made with [Material UI's](https://material-ui.com/?ref=devias-io) components, [React](https://reactjs.org/?ref=devias-io) and of course [Next.js](https://github.com/vercel/next.js/?ref=devias-io) to boost your app development process! We'll launch a pro version soon, so if you are interested subscribe to our personal emailing list on [https://devias.io/](https://devias.io/)