Tutorial notebooks overwritten

[ElliottKasoar]

Currently, the notebooks are run on tagged releases, with the contents visible in the documentation (I believe).

However, on subsequent pushes to main, which also build the docs, but don't execute the notebooks, the blank notebooks are instead copied over, which remotes the previously calculated outputs.

We could add something like exclude_patterns, but then I'm not sure if they would be included at all, and it raises various warnings.

Alternatively, we could include the notebooks in their run state, which are not overwritten by default, and can be forced to re-execute, but this would require uploading larger notebook files to the docs.

Other suggestions welcome.