Fix synapse errors not print out issue (feathr-ai#734)

Co-authored-by: enya-yx <enya@v-ellinlu-2.fareast.corp.microsoft.com>

feathr_project/feathr/spark_provider/_synapse_submission.py

@@ -325,7 +325,7 @@ def create_spark_batch_job(self, job_name, main_file, class_name=None,
     def get_driver_log(self, job_id) -> str:
         # @see: https://docs.microsoft.com/en-us/azure/synapse-analytics/spark/connect-monitor-azure-synapse-spark-application-level-metrics
         app_id = self.get_spark_batch_job(job_id).app_id
-        url = "%s/sparkhistory/api/v1/sparkpools/%s/livyid/%s/applications/%s/driverlog/stdout/?isDownload=true" % (self._synapse_dev_url, self._spark_pool_name, job_id, app_id)
+        url = "%s/sparkhistory/api/v1/sparkpools/%s/livyid/%s/applications/%s/driverlog/stderr/?isDownload=true" % (self._synapse_dev_url, self._spark_pool_name, job_id, app_id)
         token = self._credential.get_token("https://dev.azuresynapse.net/.default").token
         req = urllib.request.Request(url=url, headers={"authorization": "Bearer %s" % token})
         resp = urllib.request.urlopen(req)