Update github io when pushed to main repo doc

[mducle]

The SpinW website is actually just an alias for a github.io static page with all the data in the spinw.github.io repo. Included in the webpage are a set of tutorials, the source and html are actually in the main spinw repo.

It would be good if the _tutorials folder in the github.io site and the tutorials/publish folder in the main repo could be synchronized by a github-actions job or similar.