Update actions/download-artifact action to v4.2.1

Author: renovate[bot]

.github/workflows/multi-build.yaml

@@ -191,7 +191,7 @@ jobs:
         # This step downloads the digest files uploaded in the build job.
         # It uses the actions/download-artifact action to download the artifacts with the pattern digests-*.
         # The downloaded files are merged into the /tmp/digests directory.
-        uses: actions/download-artifact@cc203385981b70ca67e1cc392babf9cc229d5806 # v4.1.9
+        uses: actions/download-artifact@95815c38cf2ff2164869cbab79da8d1f422bc89e # v4.2.1
         with:
           path: /tmp/digests
           pattern: digests-*