Bump which from 6.0.2 to 6.0.3

Bumps [which](https://github.com/harryfei/which-rs) from 6.0.2 to 6.0.3.
- [Release notes](https://github.com/harryfei/which-rs/releases)
- [Changelog](https://github.com/harryfei/which-rs/blob/master/CHANGELOG.md)
- [Commits](harryfei/which-rs@6.0.2...6.0.3)

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

Signed-off-by: dependabot[bot] <[email protected]>