Fix LDAP user registration (#229)

Simple fix for LDAP user registration. I'm not sure what changed but I managed to get Akkoma running in a debug session and figured out it was missing a match for an extra value at the end. I don't know Elixir all that well so I'm not sure if this was the correct way to do it... but it works. :)

Reviewed-on: https://akkoma.dev/AkkomaGang/akkoma/pulls/229
Co-authored-by: nullobsi <me@nullob.si>
Co-committed-by: nullobsi <me@nullob.si>

lib/pleroma/web/auth/ldap_authenticator.ex

@@ -102,7 +102,7 @@ defmodule Pleroma.Web.Auth.LDAPAuthenticator do
            {:scope, :eldap.wholeSubtree()},
            {:timeout, @search_timeout}
          ]) do
-      {:ok, {:eldap_search_result, [{:eldap_entry, _, attributes}], _}} ->
+      {:ok, {:eldap_search_result, [{:eldap_entry, _, attributes}], _, _}} ->
         params = %{
           name: name,
           nickname: name,