chore(deps): update dependency google-cloud-bigquery-storage to v2.8.0 (GoogleCloudPlatform#6685)

Author: renovate-bot

bigquery/bqml/requirements.txt

@@ -1,5 +1,5 @@
 google-cloud-bigquery[pandas,bqstorage]==2.25.1
-google-cloud-bigquery-storage==2.7.0
+google-cloud-bigquery-storage==2.8.0
 pandas==1.1.5; python_version < '3.7'
 pandas==1.2.0; python_version > '3.6'
 pyarrow==5.0.0

bigquery/datalab-migration/requirements.txt

@@ -1,6 +1,6 @@
 grpcio==1.40.0
 google-cloud-bigquery[pandas,pyarrow]==2.25.1
-google-cloud-bigquery-storage==2.7.0
+google-cloud-bigquery-storage==2.8.0
 datalab==1.2.0
 ipython==7.18.1; python_version > '3.6'
 ipython==7.16.1; python_version < '3.7'

bigquery/pandas-gbq-migration/requirements.txt

@@ -1,5 +1,5 @@
 google-cloud-bigquery==2.25.1
-google-cloud-bigquery-storage==2.7.0
+google-cloud-bigquery-storage==2.8.0
 pandas==1.1.5; python_version < '3.7'
 pandas==1.2.4; python_version > '3.6'
 pandas-gbq==0.15.0; python_version > '3.6'