build(deps): bump dawidd6/action-download-artifact from 20 to 21 (#2613)

Bumps [dawidd6/action-download-artifact](https://github.com/dawidd6/action-download-artifact) from 20 to 21.
- [Release notes](https://github.com/dawidd6/action-download-artifact/releases)
- [Commits](dawidd6/action-download-artifact@v20...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>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/ci-test-results.yml

@@ -39,15 +39,15 @@ jobs:
 
     steps:
       - name: Download Test Results
-        uses: dawidd6/action-download-artifact@v20
+        uses: dawidd6/action-download-artifact@v21
         with:
           run_id: ${{ github.event.workflow_run.id }}
           name: test-results-.*
           name_is_regexp: true
           path: artifacts
 
       - name: Download Event File
-        uses: dawidd6/action-download-artifact@v20
+        uses: dawidd6/action-download-artifact@v21
         with:
           run_id: ${{ github.event.workflow_run.id }}
           name: event-file-ubuntu-24.04