Update apiary.apib (#133)

Fix the provided example for Create a dictionary entry. When a new entry created the response status code is 201 and the type (application/json),

apiary.apib

@@ -6764,7 +6764,7 @@ issues[n].canAddToDictionary: true
             "documentId": "283ab1e075f21a"              // required if scope=document
         }
 
-+ Response 200
++ Response 201 (application/json)
 
         {
           "data": {