deletion of an old domain and update information about new domain

domains/_github-pages-challenge-caodoc.caodoc.json

@@ -1,9 +0,0 @@
-{
-  "owner": {
-    "username": "caodoc",
-    "discord": "caodoc"
-  },
-  "record": {
-    "TXT": "c3aa36c2b7f2e2bf94a92b760760ca"
-  }
-}

domains/_github-pages-challenge-cc4dev.cc4dev.json

@@ -2,7 +2,7 @@
     "owner":
     {
         "username": "cc4dev",
-        "email": "caodoc@proton.me"
+        "email": "cc4dev@proton.me"
     },
     "record":
     {

domains/caodoc.json

@@ -1,9 +0,0 @@
-{
-  "owner": {
-    "username": "caodoc",
-    "email": "caodoc@proton.me"
-  },
-  "record": {
-    "CNAME": "caodoc.github.io"
-  }
-}

domains/cc4dev.json

@@ -2,7 +2,7 @@
     "owner":
     {
         "username": "cc4dev",
-        "email": "caodoc@proton.me"
+        "email": "cc4dev@proton.me"
     },
     "record":
     {