npmauto: bump chai from 4.2.0 to 4.3.4 in /chromium

Bumps [chai](https://github.com/chaijs/chai) from 4.2.0 to 4.3.4.
- [Release notes](https://github.com/chaijs/chai/releases)
- [Changelog](https://github.com/chaijs/chai/blob/main/History.md)
- [Commits](chaijs/chai@4.2.0...v4.3.4)

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