chore: release 2.2.0 (#413)
chore: release 2.2.0 (#413)

Co-authored-by: release-please[bot] <6fb7beb84df8ef60a675db3372864553c0b582c5@users.noreply.github.com>
GoogleCloudPlatform/nodejs-docs-samples,GoogleCloudPlatform/nodejs-docs-samples,GoogleCloudPlatform/nodejs-docs-samples,GoogleCloudPlatform/nodejs-docs-samples