fix(ci): bump actions/download-artifact from 6.0.0 to 8.0.0

Bumps [actions/download-artifact](https://github.com/actions/download-artifact) from 6.0.0 to 8.0.0.
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@018cc2c...70fc10c)

---
updated-dependencies:
- dependency-name: actions/download-artifact
  dependency-version: 8.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]