Update README.md

README.md

@@ -68,4 +68,5 @@ Image Credits:
 
 **If you like the theme and you are feeling generous, I would greatly appreciate your donation. Donations are made by Paypal**
 
-https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=629XCUSXBHCBC
+[![Donate](https://www.paypalobjects.com/en_US/i/btn/btn_donateCC_LG.gif "AdminLTE Presentation")](https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=629XCUSXBHCBC "Donate")
+