Update CNAME and add email in JSON file

domains/uttamgupta2712.json

@@ -1,8 +1,9 @@
 {
     "owner": {
-        "username": "uttamgupta2712"
+        "username": "uttamgupta2712",
+        "email": "uttamgupta2712@gmail.com"
     },
     "records": {
-        "CNAME": "uttamgupta2712.github.io"
+        "CNAME": "uttamgupta2712.vercel.app"
     }
 }