chore: move docs check from kokoro to GH actions (#334)

* chore: move docs check from kokoro to GH actions

* 🦉 Updates from OwlBot

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

* 🦉 Updates from OwlBot

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

* fix typo

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>
4 files changed