Fix email format in _vercel.sanatan.json

domains/_vercel.sanatan.json

@@ -1,9 +1,9 @@
 {
     "owner": {
         "username": "sanatan223",
-        "email": "[sanatan_dev+github@outlook.com]"
+        "email": "sanatan_dev+github@outlook.com"
     },
     "records": {
         "TXT": "vc-domain-verify=sanatan.is-a.dev,83f78c98b193f3671c63"
     }
-}
+}