Bump actions/download-artifact from 4.1.7 to 6.0.0

Bumps [actions/download-artifact](https://github.com/actions/download-artifact) from 4.1.7 to 6.0.0.
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](https://github.com/actions/download-artifact/compare/v4.1.7...v6.0.0)

---
updated-dependencies:
- dependency-name: actions/download-artifact
  dependency-version: 6.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/ci-ifcopenshell-docker.yml

@@ -94,7 +94,7 @@ jobs:
         lfs: true
     
     - name: Download 
-      uses: actions/download-artifact@v4.1.7
+      uses: actions/download-artifact@v6.0.0
       with:
         # Artifact name
         name: ifcos-artifacts