chore(deps): update dependency boto3 to v1.16.25 (#5004)
chore(deps): update dependency boto3 to v1.16.25 (#5004)

Co-authored-by: Christopher Wilcox <1a61e7a0041d068722f1c352424109b22f854ce0@google.com>
GoogleCloudPlatform/python-docs-samples,GoogleCloudPlatform/python-docs-samples,GoogleCloudPlatform/python-docs-samples,GoogleCloudPlatform/python-docs-samples