feat(server): expose mail server name config in admin dashboard (#13792)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

* **New Features**
  * Added SMTP name configuration field to notification settings.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

packages/frontend/admin/src/modules/settings/config.ts

@@ -75,6 +75,7 @@ export const KNOWN_CONFIG_GROUPS = [
     name: 'Notification',
     module: 'mailer',
     fields: [
+      'SMTP.name',
       'SMTP.host',
       'SMTP.port',
       'SMTP.username',