Update README [ci skip]

Author: n-rodriguez

README.md

@@ -690,6 +690,8 @@ You'll find a sample project [here](https://github.com/ajahongir/ajax-datatables
 
 Filtering by JSONB column values : [#277](https://github.com/jbox-web/ajax-datatables-rails/issues/277)
 
+Use [has_scope](https://github.com/plataformatec/has_scope) gem with `ajax-datatables-rails` : [#280](https://github.com/jbox-web/ajax-datatables-rails/issues/280)
+
 ## Contributing
 
 1. Fork it