build(deps): bump assert_cmd from 2.0.5 to 2.0.8

Bumps [assert_cmd](https://github.com/assert-rs/assert_cmd) from 2.0.5 to 2.0.8.
- [Release notes](https://github.com/assert-rs/assert_cmd/releases)
- [Changelog](https://github.com/assert-rs/assert_cmd/blob/master/CHANGELOG.md)
- [Commits](assert-rs/assert_cmd@v2.0.5...v2.0.8)

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

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