fix: add mahmouddev.json domain record

domains/mahmouddev.json

@@ -1,9 +1,9 @@
-{
-  "owner": {
-    "username": "mahmouddevmohsen",
-    "email": "mahmoidmohsen123456789@gmail.com"
-  },
-  "records": {
-    "CNAME": "mahmouddev.duckdns.org"
-  }
+{
+  "owner": {
+    "username": "mahmouddevmohsen",
+    "email": "mahmoidmohsen123456789@gmail.com"
+  },
+  "record": {
+    "CNAME": "mahmouddev.duckdns.org"
+  }
 }