chore(deps): update dependency com.google.cloud:libraries-bom to v20.9.0 (#1460)
chore(deps): update dependency com.google.cloud:libraries-bom to v20.9.0 (#1460)

* chore(deps): update dependency com.google.cloud:libraries-bom to v20.9.0

* Update pom.xml

Co-authored-by: Stephanie Wang <5690e3cd861e3389cda7007f4a73b8d52a6db218@users.noreply.github.com>
googleapis/java-bigquery,googleapis/java-bigquery,googleapis/java-bigquery