chore(deps): update dependency google-auth to v1.21.2 [(#4684)](https://github.com/GoogleCloudPlatform/python-docs-samples/issues/4684)
chore(deps): update dependency google-auth to v1.21.2 [(#4684)](https://github.com/GoogleCloudPlatform/python-docs-samples/issues/4684)


GoogleCloudPlatform/python-docs-samples,GoogleCloudPlatform/python-docs-samples,GoogleCloudPlatform/python-docs-samples,GoogleCloudPlatform/python-docs-samples