chore(deps-dev): bump cssnano from 8.0.5 to 8.0.6 (#8199)

Bumps [cssnano](https://github.com/cssnano/cssnano) from 8.0.5 to 8.0.6.
- [Release notes](https://github.com/cssnano/cssnano/releases)
- [Commits](https://github.com/cssnano/cssnano/compare/cssnano@8.0.5...cssnano@8.0.6)

---
updated-dependencies:
- dependency-name: cssnano
  dependency-version: 8.0.6
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>