Update the demo notebook

We're doing some big usability drives and changes to our protocols, so things are likely going to be out of date (if they aren't already) with openfe v1.9.

The task is to review cinnabar & protocol uses in https://github.com/OpenFreeEnergy/alchemiscale/blob/main/docs/tutorials/demo/Alchemiscale%20Demo.ipynb and see what needs updating.

A task for ~ 1 month from now?