Update wen.json

I have updated the record key from cname to CNAME as per the naming convention.
Please review when you have time. Thank you for your support!

domains/wen.json

@@ -4,6 +4,6 @@
         "email": "quocanh010104@gmail.com"
     },
     "records": {
-        "cname": "wen0x0.github.io"
+        "CNAME": "wen0x0.github.io"
     }
 }