Update _config.yml for production url

Author: kittinan

Diff for: _config.yml

@@ -6,7 +6,7 @@ words_per_minute: 800
 # Your site's domain goes here (eg: https://mmistakes.github.io, http://yourdomain.com, etc)
 # When testing locally leave blank or use http://localhost:4000
 # url: # comment this when pushing to server
-#url: https://tupleblog.netlify.com # comment this when testing locally
+url: https://tupleblog.github.io # comment this when testing locally
 
 # Owner/author information
 owner: