chore(deps): bump dawidd6/action-download-artifact from 19 to 21

Bumps [dawidd6/action-download-artifact](https://github.com/dawidd6/action-download-artifact) from 19 to 21.
- [Release notes](https://github.com/dawidd6/action-download-artifact/releases)
- [Commits](dawidd6/action-download-artifact@v19...v21)

---
updated-dependencies:
- dependency-name: dawidd6/action-download-artifact
  dependency-version: '21'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/benchmark_fork_track.yml

@@ -20,13 +20,13 @@ jobs:
           egress-policy: audit
 
       - name: Download Benchmark Results
-        uses: dawidd6/action-download-artifact@v19
+        uses: dawidd6/action-download-artifact@v21
         with:
           name: ${{ env.BENCHMARK_RESULTS }}
           run_id: ${{ github.event.workflow_run.id }}
 
       - name: Download PR Event
-        uses: dawidd6/action-download-artifact@v19
+        uses: dawidd6/action-download-artifact@v21
         with:
           name: ${{ env.PR_EVENT }}
           run_id: ${{ github.event.workflow_run.id }}