Disable caching for retrolite directive

[kolibril13]

Related to jupyterlite/jupyterlite#1067

When I go to the retro-lite example https://jupyterlite-sphinx.readthedocs.io/en/latest/directives/retrolite.html with a specific notebook (.. retrolite:: my_notebook.ipynb), and make some changes, these changes are permanent and there is no way to get back to the original example.
Similar how @agoose77 solved that issue, it would be great to have a similar solution for this jupyterlite-sphinx directive.
jupyterlite/jupyterlite#1067 (comment)

[agoose77]

You can already do this with the existing jupyter-lite.json configuration. Just place your configuration file in lite/ relative to your Sphinx directory (or set the jupyterlite_dir Sphinx configuration variable): https://github.com/scikit-hep/awkward/blob/main/docs/lite/jupyter-lite.json