chore(deps-dev): bump the css group with 2 updates

Bumps the css group with 2 updates: [cssnano](https://github.com/cssnano/cssnano) and [postcss](https://github.com/postcss/postcss).


Updates `cssnano` from 7.0.5 to 7.0.6
- [Release notes](https://github.com/cssnano/cssnano/releases)
- [Commits](https://github.com/cssnano/cssnano/compare/[email protected]@7.0.6)

Updates `postcss` from 8.4.43 to 8.4.45
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](postcss/postcss@8.4.43...8.4.45)

---
updated-dependencies:
- dependency-name: cssnano
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: css
- dependency-name: postcss
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: css
...

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