chore(deps): update dependency pyarrow to v1.0.1 [(#4566)](GoogleCloudPlatform/python-docs-samples#4566)

Author: renovate-bot

samples/to_dataframe/requirements.txt

@@ -1,7 +1,7 @@
 google-auth==1.20.1
 google-cloud-bigquery-storage==1.0.0
 google-cloud-bigquery==1.25.0
-pyarrow==1.0.0
+pyarrow==1.0.1
 ipython==7.10.2; python_version > '3.0'
 ipython==5.9.0; python_version < '3.0'
 pandas==0.25.3; python_version > '3.0'