Fix pagination in AP outbox.json

lib/pleroma/web/activity_pub/views/user_view.ex

@@ -227,11 +227,12 @@ def render("outbox.json", %{user: user, max_id: max_qid}) do
 
     activities = ActivityPub.fetch_user_activities(user, nil, params)
 
+    # this is sorted chronologically, so first activity is the newest (max)
     {max_id, min_id, collection} =
       if length(activities) > 0 do
         {
-          Enum.at(Enum.reverse(activities), 0).id,
           Enum.at(activities, 0).id,
+          Enum.at(Enum.reverse(activities), 0).id,
           Enum.map(activities, fn act ->
             {:ok, data} = Transmogrifier.prepare_outgoing(act.data)
             data