Bump chrono-tz from 0.8.3 to 0.8.4

Bumps [chrono-tz](https://github.com/chronotope/chrono-tz) from 0.8.3 to 0.8.4.
- [Release notes](https://github.com/chronotope/chrono-tz/releases)
- [Changelog](https://github.com/chronotope/chrono-tz/blob/main/CHANGELOG.md)
- [Commits](https://github.com/chronotope/chrono-tz/commits)

---
updated-dependencies:
- dependency-name: chrono-tz
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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