Update actions/download-artifact action to v5

Author: renovate[bot]

.github/workflows/build_release_firmwares.yml

@@ -813,7 +813,7 @@ jobs:
 
           echo "version=${version}" > $GITHUB_OUTPUT
 
-      - uses: actions/download-artifact@v4
+      - uses: actions/download-artifact@v5
         with:
           merge-multiple: true