Update README.md

Author: mitesh77

README.md

@@ -2,7 +2,7 @@
 
 completely free for everyone. Its build-in Flutter Dart.
 
-<a href="https://www.buymeacoffee.com/mitesh"><img src="https://cdn.buymeacoffee.com/buttons/v2/default-yellow.png"></a>
+<a href="https://www.buymeacoffee.com/mitesh"><img src="https://cdn.buymeacoffee.com/buttons/v2/default-yellow.png" height="60"></a>
 
 ![Image](best_flutter_ui_templates/assets/introduction_animation/introduction_animation.png)
 ![Image](best_flutter_ui_templates/assets/hotel/hotel_booking.png)