Update storage_get_metadata.py (#4615)
Update storage_get_metadata.py (#4615)

Co-authored-by: Leah E. Cole <a5082685b0b89abc4f85079ca3a58177707489f8@users.noreply.github.com>
GoogleCloudPlatform/python-docs-samples,GoogleCloudPlatform/python-docs-samples,GoogleCloudPlatform/python-docs-samples,GoogleCloudPlatform/python-docs-samples