Update duyminhhello.json

domains/duyminhhello.json

@@ -3,7 +3,7 @@
         "username": "tranphamduyminhhello",
         "email": "tranphamduyminh.hello@gmail.com"
     },
-    "record": {
-        "CNAME": ["tranphamduyminhhello.github.io"]
-    }
+     "record": {
+    "CNAME": "tranphamduyminhhello.github.io"
+  }
 }