Merge pull request #16 from pocke/patch-1

Update slack_invite_link

Author: sue445

_config.yml

@@ -20,4 +20,4 @@ twitter:
   card: summary_large_image
   username: ruby-jp
 
-slack_invite_link: https://join.slack.com/t/ruby-jp/shared_invite/enQtNzE1NDg1ODE2MDM2LTE1NTc2Y2M0ZThlNzdmOWEyZjYwZjdhZDAwNjNhMGE0NDJiODcwMTNkZWRjOTgyMzNkZjEyMmQ1ZWYyNzkzYzk
+slack_invite_link: https://join.slack.com/t/ruby-jp/shared_invite/enQtODQ0NTEwMzg0MjEyLWQ3MjUyYzg2NDdjY2NjMzNmOWRiM2NmZmY2MjBmMDQ0N2Y5ODg3ZGZkYjMwMThkOWI4NmVlMTJjMWE2YmMzZTc