build(deps): Bump tailwindcss from 3.3.1 to 3.4.15 in /docs

Bumps [tailwindcss](https://github.com/tailwindlabs/tailwindcss) from 3.3.1 to 3.4.15.
- [Release notes](https://github.com/tailwindlabs/tailwindcss/releases)
- [Changelog](https://github.com/tailwindlabs/tailwindcss/blob/v3.4.15/CHANGELOG.md)
- [Commits](tailwindlabs/tailwindcss@v3.3.1...v3.4.15)

---
updated-dependencies:
- dependency-name: tailwindcss
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>