add missing semicolon

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: simonLeary42

resources/mail/user_modifier_added.php

@@ -51,5 +51,5 @@
 
 <?php /////////////////////////////////////////////////////////////////////////////////////////// ?>
 <?php default: ?>
-<?php throw new \Exception("unknown modifier: " . $data["modifier"]) ?>
+<?php throw new \Exception("unknown modifier: " . $data["modifier"]); ?>
 <?php endswitch; ?>