Fix fatal error due to missing "use"

src/Module/Proxy.php

@@ -8,6 +8,7 @@ namespace Friendica\Module;
 use Friendica\App;
 use Friendica\BaseModule;
 use Friendica\Core\Config;
+use Friendica\Core\L10n;
 use Friendica\Core\System;
 use Friendica\Database\DBA;
 use Friendica\Model\Photo;