Fix backend tests

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

lib/service/workers/activity_builder.ex

@@ -52,7 +52,7 @@ defmodule Mobilizon.Service.Workers.ActivityBuilder do
     |> Enum.map(& &1.user_id)
     |> Enum.filter(& &1)
     |> Enum.uniq()
-    |> Enum.map(&Users.get_user_with_settings!/1)
+    |> Enum.map(&Users.get_user_with_activity_settings!/1)
   end
 
   defp users_to_notify(_), do: []