Add documentation for arrow compression options (#511)
Add documentation for arrow compression options (#511)

Co-authored-by: Vinay Londhe <2e56f8e622aa6359d6106a85a084bb6643bcd058@google.com>
GoogleCloudDataproc/spark-bigquery-connector,GoogleCloudDataproc/spark-bigquery-connector,GoogleCloudDataproc/spark-bigquery-connector