fix formatting

domains/send.auth.sign.alvin.json

@@ -5,10 +5,10 @@
   },
   "record": {
     "MX": [
-{
-target: "feedback-smtp.ap-northeast-1.amazonses.com",
-priority: 10
-}],
+      {
+        target: "feedback-smtp.ap-northeast-1.amazonses.com",
+        priority: 10
+      }],
     "TXT": ["v=spf1 include:amazonses.com ~all"]
   }
 }