chore: update authorized_user.json and use latest sphinx (#900) * chore: update authorized_user.json * chore: use latest sphinx * 🦉 Updates from OwlBot See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>