Change repo URL and update MX records structure

Updated repository URL and modified MX records format.

domains/codewithhanzlah.json

@@ -1,6 +1,6 @@
 {
   "description": "Personal portfolio of Muhammad Hanzlah — AI Engineer",
-  "repo": "https://github.com/codewithhanzlah/codewithhanzlah.github.io",
+  "repo": "https://github.com",
   "owner": {
     "username": "codewithhanzlah",
     "email": "codewithhanzlah@gmail.com"
@@ -13,8 +13,14 @@
       "185.199.111.153"
     ],
     "MX": [
-      "mx1.improvmx.com.",
-      "mx2.improvmx.com."
+      {
+        "priority": 10,
+        "mx": "://improvmx.com."
+      },
+      {
+        "priority": 20,
+        "mx": "://improvmx.com."
+      }
     ]
   }
 }