Bump cargo_metadata from 0.23.0 to 0.23.1 in /examples/supplementary

Bumps [cargo_metadata](https://github.com/oli-obk/cargo_metadata) from 0.23.0 to 0.23.1.
- [Release notes](https://github.com/oli-obk/cargo_metadata/releases)
- [Changelog](https://github.com/oli-obk/cargo_metadata/blob/main/CHANGELOG.md)
- [Commits](oli-obk/cargo_metadata@0.23.0...0.23.1)

---
updated-dependencies:
- dependency-name: cargo_metadata
  dependency-version: 0.23.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]