chore(deps): bump actions/download-artifact from 5 to 6

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

---
updated-dependencies:
- dependency-name: actions/download-artifact
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/docker-unified.yml

@@ -642,7 +642,7 @@ jobs:
 
       - name: Download build Metadata
         if: ${{ needs.setup.outputs.publish == 'true' || needs.setup.outputs.pr-publish == 'true' }}
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         with:
           name: build-metadata-${{ needs.setup.outputs.tag }}
           path: ${{ github.workspace }}/build