MascotController dialyzer error

lib/pleroma/web/pleroma_api/controllers/mascot_controller.ex:31:call
The function call will not succeed.

Pleroma.Web.ActivityPub.ActivityPub.upload(_file :: atom() | %{:content_type => _, _ => _}, [{:actor, <<_::56, _::size(8)>>}, ...]) ::
  :ok
def a() do
  :ok
end

will never return since the 2nd arguments differ
from the success typing arguments:

(any(), [
  {:activity_type | :description | :filters | :size_limit | :type | :uploader,
   atom() | binary() | [atom()] | non_neg_integer()}
])

lib/pleroma/upload.ex

@@ -51,6 +51,7 @@ defmodule Pleroma.Upload do
           | {:size_limit, nil | non_neg_integer()}
           | {:uploader, module()}
           | {:filters, [module()]}
+          | {:actor, String.t()}
 
   @type t :: %__MODULE__{
           id: String.t(),