chore(deps): bump actions/download-artifact from 4 to 8 (#2922)

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

.github/workflows/ci.yml

@@ -324,7 +324,7 @@ jobs:
           cache: npm
       - run: npm ci
       - name: Download all shard coverage
-        uses: actions/download-artifact@v7
+        uses: actions/download-artifact@v8
         with:
           pattern: coverage-shard-*
           path: coverage-shards/

.github/workflows/docker-publish.yml

@@ -229,7 +229,7 @@ jobs:
           password: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Download digests
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v8
         with:
           pattern: digests-*
           path: /tmp/digests