Fix formatting in juansilva.json

domains/juansilva.json

@@ -2,7 +2,7 @@
   "owner": {
     "username": "juansilvadesign",
     "email": "contact@juansilva.design",
-    "whatsapp": "+5521966442965"
+    "whatsapp": "+5521966442965",
     "linkedin": "juansilvadesign",
     "twitter": "juansilvadesign",
     "instagram": "juansilva.design",