chore(deps): update dependency pyarrow to v5 (#255)

Author: renovate-bot

packages/google-cloud-bigquery-storage/samples/to_dataframe/requirements.txt

@@ -1,7 +1,7 @@
 google-auth==1.34.0
 google-cloud-bigquery-storage==2.6.2
 google-cloud-bigquery==2.23.0
-pyarrow==4.0.1
+pyarrow==5.0.0
 ipython==7.24.0; python_version > '3.6'
 ipython==7.16.1; python_version <= '3.6'
 pandas==1.2.5; python_version > '3.6'