Update nostr-contact.html

layouts/shortcodes/nostr-contact.html

@@ -133,7 +133,8 @@
             name: document.getElementById('nc-name').value,
             contact: document.getElementById('nc-contact').value,
             message: document.getElementById('nc-message').value,
-            timestamp: new Date().toISOString()
+            timestamp: new Date().toISOString(),
+            source: 'sdbitcoiners.com'
           }));
           
           const event = {