chore(deps): bump actions/download-artifact from 7 to 8 (#113)

Bumps [actions/download-artifact](https://github.com/actions/download-artifact) from 7 to 8.
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@v7...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/performance_score_director.yml

@@ -275,12 +275,12 @@ jobs:
           chmod +x run-scoredirector.sh
 
       - name: Download the baseline binary
-        uses: actions/download-artifact@v7
+        uses: actions/download-artifact@v8
         with:
           name: ${{ matrix.example }}-baseline
           path: ./timefold-solver-benchmarks
       - name: Download the SUT binary
-        uses: actions/download-artifact@v7
+        uses: actions/download-artifact@v8
         with:
           name: ${{ matrix.example }}-sut
           path: ./timefold-solver-benchmarks