update readme

Author: rmanguinho

README.md

@@ -8,3 +8,7 @@
 * Design Patterns
 
 > ### [Link para o curso completo no Youtube](https://www.youtube.com/playlist?list=PL9aKtVrF05DyEwK5kdvzrYXFdpZfj1dsG)
+<br />
+
+## Contribua com esse Projeto <3
+<a href='https://ko-fi.com/M4M265FO6' target='_blank'><img height='36' style='border:0px;height:36px;' src='https://cdn.ko-fi.com/cdn/kofi3.png?v=3' border='0' alt='Buy Me a Coffee at ko-fi.com' /></a>