Bump actions/download-artifact from 4.1.3 to 4.1.4

Bumps [actions/download-artifact](https://github.com/actions/download-artifact) from 4.1.3 to 4.1.4.
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@v4.1.3...v4.1.4)

---
updated-dependencies:
- dependency-name: actions/download-artifact
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

.github/workflows/ci.yaml

@@ -365,7 +365,7 @@ jobs:
           echo "Failed to restore Python virtual environment from cache"
           exit 1
       - name: Download all coverage artifacts
-        uses: actions/[email protected].3
+        uses: actions/[email protected].4
       - name: Combine coverage results
         run: |
           . venv/bin/activate