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] <support@github.com>

.github/workflows/ci.yml

@@ -101,7 +101,7 @@ jobs:
           cache: 'sbt'
 
       - name: Download compilation cache
-        uses: actions/download-artifact@v2
+        uses: actions/download-artifact@v4.1.7
         with:
           path: /tmp/remote-cache