Bump actions/download-artifact from 2 to 4.1.7 in /.github/workflows (#338)

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](https://github.com/actions/download-artifact/compare/v2...v4.1.7)

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

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

.github/workflows/release.yaml

@@ -80,7 +80,7 @@ jobs:
 
         steps:
             - name: Download build assets (${{ matrix.packages }}.pdf)
-              uses: actions/download-artifact@v2
+              uses: actions/download-artifact@v4.1.7
               with:
                   name: ctfp
                   path: ctfp