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Update settings fails to save due to changes in router_notifications
With the latest changes in `router_notifications` (ntfy), saving settings on the Update page in reForis fails. I've made a little bit of investigation and it's due refactoring of `update_reboot_settings` where reForis is leaning on that [action](https://gitlab.nic.cz/turris/reforis/reforis/-/blob/master/reforis/foris_controller_api/modules/updater.py#L63). Now the `POST` request on `/api/updates` failes with `400 - Bad Request ` status code and this [FC_error.html](/uploads/6e6292e08642b585b52737d19756e8b4/FC_error.html).
issue