fix: Trailing comma causing JSON_PARSING_ERROR (#4815)

Author: nschonni

specification/machinelearningservices/resource-manager/Microsoft.MachineLearningServices/stable/2018-11-19/examples/amlComputeListNodes.json

@@ -22,7 +22,7 @@
             "port": 50001
           }
         ],
-        "nextLink": "nextLink",
+        "nextLink": "nextLink"
       }
     }
   }