build(deps): bump actions/download-artifact from 7 to 8 (#58)

Bumps [actions/download-artifact](https://github.com/actions/download-artifact) from 7 to 8.
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@v7...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/release.yml

@@ -138,7 +138,7 @@ jobs:
         with:
           ruby-version: ${{ matrix.ruby }}
 
-      - uses: actions/download-artifact@v7
+      - uses: actions/download-artifact@v8
         with:
           name: cross-gem-x86_64-linux
           path: pkg/
@@ -162,7 +162,7 @@ jobs:
         with:
           ruby-version: ${{ matrix.ruby }}
 
-      - uses: actions/download-artifact@v7
+      - uses: actions/download-artifact@v8
         with:
           name: native-gem-arm64-darwin
           path: pkg/
@@ -191,7 +191,7 @@ jobs:
           ruby-version: "3.4"
           bundler-cache: true
 
-      - uses: actions/download-artifact@v7
+      - uses: actions/download-artifact@v8
         with:
           path: pkg/
           pattern: "{cross-gem-*,native-gem-*,source-gem}"