Bump actions/download-artifact from 4.1.4 to 4.1.7 in /.github/workflows (#574)

Bumps [actions/download-artifact](https://github.com/actions/download-artifact) from 4.1.4 to 4.1.7.
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@v4.1.4...v4.1.7)

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

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

Author: dependabot[bot]

.github/workflows/pr.yml

@@ -78,7 +78,7 @@ jobs:
         ref: gh-pages
         path: gh-pages
     - name: Retrieve site
-      uses: actions/[email protected].4
+      uses: actions/[email protected].7
       with:
         name: site
         path: gh-pages