Bump actions/download-artifact from 7.0.0 to 8.0.0 (#932)

Bumps [actions/download-artifact](https://github.com/actions/download-artifact) from 7.0.0 to 8.0.0.
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@v7.0.0...v8.0.0)

---
updated-dependencies:
- dependency-name: actions/download-artifact
  dependency-version: 8.0.0
  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

@@ -159,7 +159,7 @@ jobs:
         if: ${{ always() }}
       - name: Download coverage data
         if: ${{ always() }}
-        uses: actions/download-artifact@v7.0.0
+        uses: actions/download-artifact@v8.0.0
         with:
           pattern: coverage-data-*
           merge-multiple: true