Fix syntax error in de_xmpp_user_list.lng

Author: ms217

interface/web/mail/lib/lang/de_xmpp_user_list.lng

@@ -1,7 +1,7 @@
 <?php
 $wb['list_head_txt'] = 'XMPP-Benutzerkonten';
 $wb['jid_txt'] = 'Jabber-ID';
-$wb['is_domain_admin_txt'] = 'Domänen-Administrator;
+$wb['is_domain_admin_txt'] = 'Domain-Administrator';
 $wb['is_muc_admin_txt'] = 'MUC-Admin';
 $wb['add_new_record_txt'] = 'Neuen Benutzer hinzufügen';
 $wb['active_txt'] = 'Aktiv';