fix(hub): use rfcEmail validator to allow IDN/Punycode email addresses (#1935)

valibot's email() action uses a domain-label regex that disallows the
-- sequence, so Punycode ACE labels like xn--mnchen-3ya.de (the ASCII
form of münchen.de) are incorrectly rejected.

Switching to rfcEmail() applies the RFC 5321 domain-label pattern,
which allows hyphens within labels and therefore accepts both standard
and internationalized domain names.

internal/site/src/components/routes/settings/notifications.tsx

@@ -24,7 +24,7 @@ interface ShoutrrrUrlCardProps {
 }
 
 const NotificationSchema = v.object({
-	emails: v.array(v.pipe(v.string(), v.email())),
+	emails: v.array(v.pipe(v.string(), v.rfcEmail())),
 	webhooks: v.array(v.pipe(v.string(), v.url())),
 })