Update README.md

Author: Fivell

README.md

@@ -55,7 +55,7 @@ To install this gem onto your local machine, run `bundle exec rake install`. To
 
 ## Contributing
 
-1. Fork it ( https://github.com/ActiveAdminPlugins/active_admin_datetimepicker/fork )
+1. Fork it ( https://github.com/activeadmin-plugins/activeadmin_datetimepicker/fork )
 2. Create your feature branch (`git checkout -b my-new-feature`)
 3. Commit your changes (`git commit -am 'Add some feature'`)
 4. Push to the branch (`git push origin my-new-feature`)