Update Authorization.AcceptGrant.request.json

Correlation token has been removed. https://developer.amazon.com/en-US/docs/alexa/device-apis/alexa-authorization.html#acceptgrant-directive-example

Author: aszk

Diff for: sample_messages/Authorization/Authorization.AcceptGrant.request.json

@@ -4,8 +4,7 @@
             "namespace": "Alexa.Authorization",
             "name": "AcceptGrant",
             "payloadVersion": "3",
-            "messageId": "1bd5d003-31b9-476f-ad03-71d471922820",
-            "correlationToken": "dFMb0z+PgpgdDmluhJ1LddFvSqZ/jCc8ptlAKulUj90jSqg=="
+            "messageId": "1bd5d003-31b9-476f-ad03-71d471922820"
         },
         "payload": {
             "grant": {
@@ -18,4 +17,4 @@
             }
         }
     }
-}
+}