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>
2 files changed