Fix the old poll votes count bug

Signed-off-by: marcin mikołajczak <git@mkljczk.pl>

lib/pleroma/object/updater.ex

@@ -5,6 +5,7 @@
 defmodule Pleroma.Object.Updater do
   require Pleroma.Constants
 
+  alias Pleroma.Maps
   alias Pleroma.Object
   alias Pleroma.Repo
   alias Pleroma.Workers.EventReminderWorker
@@ -116,6 +117,7 @@ defp maybe_update_poll(to_be_updated, updated_object) do
       # Choices are the same, but counts are different
       to_be_updated
       |> Map.put(key, updated_object[key])
+      |> Maps.put_if_present("votersCount", updated_object["votersCount"])
     else
       # Choices (or vote type) have changed, do not allow this
       _ -> to_be_updated