chore(deps): update dependency sphinx to v4.1.1 (#67)
chore(deps): update dependency sphinx to v4.1.1 (#67)

Co-authored-by: Dan Lee <73a4690aaee1868a8cc9d982a8fc87c8f9121c2e@users.noreply.github.com>
googleapis/sphinx-docfx-yaml,googleapis/sphinx-docfx-yaml