build: bump listen from 3.2.0 to 3.2.1 in /docs

Bumps [listen](https://github.com/guard/listen) from 3.2.0 to 3.2.1.
- [Release notes](https://github.com/guard/listen/releases)
- [Commits](https://github.com/guard/listen/compare/v3.2.0...v3.2.1

)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>