Bump actions/download-artifact from 2 to 4.1.7 in /.github/workflows

Bumps [actions/download-artifact](https://github.com/actions/download-artifact) from 2 to 4.1.7.
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@v2...v4.1.7)

---
updated-dependencies:
- dependency-name: actions/download-artifact
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/generate.yml

@@ -43,7 +43,7 @@ jobs:
             git remote add origin https://${GITHUB_REPOSITORY_OWNER}:${{ secrets.GITHUB_TOKEN }}@github.com/${GITHUB_REPOSITORY}
           )
       - name: Download artifacts
-        uses: actions/download-artifact@v2
+        uses: actions/download-artifact@v4.1.7
         with:
           name: gh-pages
           path: artifacts