Update mxrcus.json

Author: pencilnav

domains/mxrcus.json

@@ -3,8 +3,8 @@
     "username": "mvrcusss",
     "email": "example@example.navnic.org"
   },
-  "description": "Ashmoor RPC website built with Vercel",
   "records": {
-    "A": ["76.76.21.21"]
-  }
+    "CNAME": "cname.vercel-dns.com"
+  },
+  "proxied": false
 }