SMTP configuration resets at every update

<img width="933" height="93" alt="Image" src="https://github.com/user-attachments/assets/0d116d4b-4cf8-4af8-9125-b39724e68de6" />

This can be fixed by setting default_phone_region
in `/var/www/nextcloud/config/config.php`,
but this resets itself after a nextcloud update.