Udpate badge

README.md

@@ -64,7 +64,7 @@ It runs smoothly on the Pi, [Termux](https://www.youtube.com/embed/AbaauM7gUJw)
 </ul></details>
 
 <p align="center">
-<a href="https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=RMLTQ76JSXJ4Q"><img src="https://img.shields.io/badge/donate-PayPal-1eb0fc.svg" alt="Donate via PayPal!" /></a>
+<a href="https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=RMLTQ76JSXJ4Q"><img src="https://img.shields.io/badge/donate-@PayPal-1eb0fc.svg" alt="Donate via PayPal!" /></a>
 </p>
 
 ## Features