Update domains/duckers.json

fixed bits asked to fix :-)

Co-authored-by: John Aerial J. Azcune <65322242+STICKnoLOGIC@users.noreply.github.com>

domains/duckers.json

@@ -3,10 +3,10 @@
         "username": "TheRealDuckers"
     },
     "records": {
-        "CNAME": "therealduckers.github.io"
-        "MX": [
-  { "target": "feedback-smtp.eu-west-1.amazonses.com", "priority": 10 }
-]
+"CNAME": "therealduckers.github.io",
+"MX": [
+"feedback-smtp.eu-west-1.amazonses.com"
+],
         "TXT": "v=spf1 include:amazonses.com ~all"
     }
 }