chore(deps): Bump actions/download-artifact from 4 to 8 (#25)

Bumps [actions/download-artifact](https://github.com/actions/download-artifact) from 4 to 8.
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@v4...v8)

---
updated-dependencies:
- dependency-name: actions/download-artifact
  dependency-version: '8'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/publish.yml

@@ -132,7 +132,7 @@ jobs:
       # that build-hyperlight creates (deps/js-host-api → Cargo checkout).
       # Downloading before setup would be clobbered when setup re-creates the link.
       - name: Download all native addons
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v8
         with:
           pattern: native-addons-*
           merge-multiple: true