Bump actions/download-artifact from 4.1.3 to 4.1.4 (#1408)

Bumps [actions/download-artifact](https://github.com/actions/download-artifact) from 4.1.3 to 4.1.4.
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](87c55149d9...c850b930e6)

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/pull-request.yml

@@ -388,7 +388,7 @@ jobs:
           workload_identity_provider: ${{ secrets.FIREBASE_TEST_LAB_WORKLOAD_IDENTITY_PROVIDER }}
           access_token_lifetime: '900s'
       - name: Download a single artifact
-        uses: actions/download-artifact@87c55149d96e628cc2ef7e6fc2aab372015aec85
+        uses: actions/download-artifact@c850b930e6ba138125429b7e5c93fc707a7f8427
         with:
           name: Demo app release binaries
       - name: Robo test