Modify repository link and MX records

Updated repository URL and MX records in JSON file.

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"
@@ -15,11 +15,11 @@
     "MX": [
       {
         "priority": 10,
-        "mx": "mx1.improvmx.com."
+        "mx": "://improvmx.com"
       },
       {
         "priority": 20,
-        "mx": "mx2.improvmx.com."
+        "mx": "://improvmx.com"
       }
     ]
   }