chore(deps): bump actions/download-artifact from 4 to 8 (#1204)

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
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Gergely Békési <slapec93@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/tests.yaml

@@ -73,7 +73,7 @@ jobs:
         if: github.ref != 'refs/heads/master'
         id: download-coverage
         continue-on-error: true
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v8
         with:
           name: coverage-master
           github-token: ${{ secrets.GITHUB_TOKEN }}