fix: switch wilfierd.is-a.dev to CNAME for GitHub Pages

I sincerely apologize for the wrong configuration earlier. 
Thank you for your patience and kind understanding!

domains/wilfierd.json

@@ -5,6 +5,6 @@
         "email": "vexbravor@gmail.com"
     },
     "records": {
-        "URL": "https://wilfierd.github.io/Profile/"
+        "CNAME": "wilfierd.github.io"
     }
 }