Bump dawidd6/action-download-artifact from 5 to 6 (#917)

Bumps [dawidd6/action-download-artifact](https://github.com/dawidd6/action-download-artifact) from 5 to 6.
- [Release notes](https://github.com/dawidd6/action-download-artifact/releases)
- [Commits](https://github.com/dawidd6/action-download-artifact/compare/v5...v6)

---
updated-dependencies:
- dependency-name: dawidd6/action-download-artifact
  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>

.github/workflows/update-pr.yml

@@ -22,7 +22,7 @@ jobs:
       with:
         submodules: true
     - name: 'Download branch build info'
-      uses: dawidd6/action-download-artifact@v5
+      uses: dawidd6/action-download-artifact@v6
       with:
         workflow: ${{ github.event.workflow_run.workflow_id }}
         run_id: ${{ github.event.workflow_run.id }}