fix(signage/playlists): name field sort

needs to be a keyword field for sorting

src/placeos-rest-api/controllers/signage/playlists.cr

@@ -62,7 +62,7 @@ module PlaceOS::Api
         "authority_id" => [authority.id.as(String)],
       })
       query.search_field "name"
-      query.sort({"name" => {order: :asc}})
+      query.sort(NAME_SORT_ASC)
       paginate_results(elastic, query)
     end