chore: [autoapprove] Update black and isort to latest versions (#688)

Source-Link: googleapis/synthtool@0c7b033
Post-Processor: gcr.io/cloud-devrel-public-resources/owlbot-python:latest@sha256:08e34975760f002746b1d8c86fdc90660be45945ee6d9db914d1508acdf9a547

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

Author: gcf-owl-bot[bot]

bigquery_storage/snippets/append_rows_pending.py

@@ -39,7 +39,6 @@ def create_row_data(row_num: int, name: str):
 
 
 def append_rows_pending(project_id: str, dataset_id: str, table_id: str):
-
     """Create a write stream, write some sample data, and commit the stream."""
     write_client = bigquery_storage_v1.BigQueryWriteClient()
     parent = write_client.table_path(project_id, dataset_id, table_id)