Bump actions/upload-artifact from 5 to 6

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 5 to 6.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](https://github.com/actions/upload-artifact/compare/v5...v6)

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

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

@@ -73,7 +73,7 @@ jobs:
         make package
       working-directory: build
     - name: Upload 
-      uses: actions/upload-artifact@v5
+      uses: actions/upload-artifact@v6
       with:
         # Artifact name
         name: ifcos-artifacts