deps: Bump actions/download-artifact from 4.2.1 to 4.3.0

Bumps [actions/download-artifact](https://github.com/actions/download-artifact) from 4.2.1 to 4.3.0.
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@95815c3...d3f86a1)

---
updated-dependencies:
- dependency-name: actions/download-artifact
  dependency-version: 4.3.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

.github/workflows/commit-stage.yml

@@ -153,7 +153,7 @@ jobs:
       id-token: write
     steps:
       - name: Download digests
-        uses: actions/download-artifact@95815c38cf2ff2164869cbab79da8d1f422bc89e # v4.2.1
+        uses: actions/download-artifact@d3f86a106a0bac45b974a628896c90dbdf5c8093 # v4.3.0
         with:
           path: /tmp/digests
           pattern: digests-backstage-*