Bump actions/download-artifact from 6 to 7 (#11)

Bumps [actions/download-artifact](https://github.com/actions/download-artifact) from 6 to 7.
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@v6...v7)

---
updated-dependencies:
- dependency-name: actions/download-artifact
  dependency-version: '7'
  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/ci.yml

@@ -273,7 +273,7 @@ jobs:
         sdist,
       ]
     steps:
-      - uses: actions/download-artifact@v6
+      - uses: actions/download-artifact@v7
       - name: Generate artifact attestation
         uses: actions/attest-build-provenance@v3
         with: