Update _config.yml

Author: code9media

_config.yml

@@ -11,4 +11,4 @@ author:
 description: OverAPI.com is a site collecting all the cheatsheets,all!
 author_info: <a href="http://overapi.com/">OverAPI</a>
 
-copyright: Design by <a href="http://overapi.com" title="overapi" target="_blank">OverAPI</a> &copy; Copyright 2012 - 2019
+copyright: Design by <a href="http://overapi.com" title="overapi" target="_blank">OverAPI</a> &copy; Copyright 2012 - 2020