docs(fixup): fixup docs (#5489)

COLLABORATOR_GUIDE.md

CONTRIBUTING.md

README.md

docs/guides/embeds.md

docs/guides/faq.md

docs/guides/hooks.md

docs/guides/languages.md

docs/guides/layout.md

docs/guides/middleware.md

docs/guides/options.md

docs/guides/plugins.md

docs/guides/react.md

docs/guides/setup.md

docs/guides/tech.md

docs/guides/text-tracks.md

docs/guides/videojs.md

docs/guides/webpack.md