chore(deps): bump actions/download-artifact from 4 to 8 (#654)

Bumps [actions/download-artifact](https://github.com/actions/download-artifact) from 4 to 8.
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@v4...v8)

---
updated-dependencies:
- dependency-name: actions/download-artifact
  dependency-version: '8'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/wheels.yml

@@ -230,7 +230,7 @@ jobs:
     if: github.event_name == 'push' && startsWith(github.ref, 'refs/tags')
     needs: [linux, musllinux, windows, macos, sdist]
     steps:
-      - uses: actions/download-artifact@v4
+      - uses: actions/download-artifact@v8
         with:
           pattern: wheels-*-obstore
           merge-multiple: true