[Security] Bump browserslist from 4.16.0 to 4.16.6

Bumps [browserslist](https://github.com/browserslist/browserslist) from 4.16.0 to 4.16.6. **This update includes a security fix.**
- [Release notes](https://github.com/browserslist/browserslist/releases)
- [Changelog](https://github.com/browserslist/browserslist/blob/main/CHANGELOG.md)
- [Commits](https://github.com/browserslist/browserslist/compare/4.16.0...4.16.6

)

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