Github Pages workflow required changes 

https://github.blog/changelog/2024-12-05-deprecation-notice-github-pages-actions-to-require-artifacts-actions-v4-on-github-com/

publish.yml needs updating by `2025-01-30` to use [actions/upload-pages-artifact@v3](https://github.com/actions/upload-pages-artifact) and [actions/deploy-pages@v4](https://github.com/actions/deploy-pages)