Fix variable name (Code Climate)

Author: gfmurphy

lib/graphiti/delegates/pagination.rb

@@ -21,7 +21,7 @@ def links
       private
 
       def pagination_params
-        @pagination_params ||= @proxy.query.params.reject { |k, _| [:action, :controller, :format].include?(k) }
+        @pagination_params ||= @proxy.query.params.reject { |key, _| [:action, :controller, :format].include?(key) }
       end
 
       def pagination_link(page)