chore(deps): update dependency google-cloud-bigquery to v2.12.0 (#116)

Author: renovate-bot

dlp/snippets/requirements.txt

@@ -2,4 +2,4 @@ google-cloud-dlp==3.0.1
 google-cloud-storage==1.36.2
 google-cloud-pubsub==2.4.0
 google-cloud-datastore==2.1.0
-google-cloud-bigquery==2.11.0
+google-cloud-bigquery==2.12.0