Update README.md

Author: AlexsandroSA

README.md

@@ -11,6 +11,7 @@
  - [100daysfrontend](http://100daysfrontend.com/)
  - [Daily CSS Images](http://dailycssimages.com/)
  - [Daily UI](http://www.dailyui.co/)
+ - [30 Days, 30 Sites](http://www.subscribepage.com/30days30sites)
 
 
 ### How to Share