build(deps): bump sphinx from 4.1.1 to 4.1.2 in /tools/docs#20

dependabot[bot] wants to merge 2 commits intomainalyssawilk/envoy:mainfrom

dependabot/pip/tools/docs/sphinx-4.1.2alyssawilk/envoy:dependabot/pip/tools/docs/sphinx-4.1.2Copy head branch name to clipboard