Fix LightOpenID usage

otherwise failing with:
PHP Fatal error: Class 'Friendica\\Module\\LightOpenID' not found in src/Module/Login.php on line 68

src/Module/Login.php

@@ -6,6 +6,7 @@ use Friendica\BaseModule;
 use Friendica\Core\Config;
 use Friendica\Database\DBM;
 use Friendica\Model\User;
+use LightOpenID;
 use dba;
 
 require_once 'boot.php';