Bump rustc_version from 0.4.0 to 0.4.1

Bumps [rustc_version](https://github.com/djc/rustc-version-rs) from 0.4.0 to 0.4.1.
- [Release notes](https://github.com/djc/rustc-version-rs/releases)
- [Commits](djc/rustc-version-rs@v0.4.0...v0.4.1)

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

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