build(deps): bump rb-fsevent from 0.10.3 to 0.10.4 in /docs

Bumps [rb-fsevent](https://github.com/thibaudgg/rb-fsevent) from 0.10.3 to 0.10.4.
- [Release notes](https://github.com/thibaudgg/rb-fsevent/releases)
- [Commits](https://github.com/thibaudgg/rb-fsevent/compare/0.10.3...v0.10.4

)

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