Fix admin panel to use working email function (send-email-v2)

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Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

src/components/admin/settings/NotifikasiTab.tsx

@@ -161,7 +161,7 @@ export function NotifikasiTab() {
     
     setSendingTest(true);
     try {
-      const { data, error } = await supabase.functions.invoke('send-test-email', {
+      const { data, error } = await supabase.functions.invoke('send-email-v2', {
         body: {
           to: testEmail,
           smtp_host: smtp.smtp_host,