Bump importlib-metadata from 6.6.0 to 6.8.0

Bumps [importlib-metadata](https://github.com/python/importlib_metadata) from 6.6.0 to 6.8.0.
- [Release notes](https://github.com/python/importlib_metadata/releases)
- [Changelog](https://github.com/python/importlib_metadata/blob/main/NEWS.rst)
- [Commits](python/importlib_metadata@v6.6.0...v6.8.0)

---
updated-dependencies:
- dependency-name: importlib-metadata
  dependency-type: indirect
  update-type: version-update:semver-minor
...

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