Changes to model don't invalidate Sphinx cache

[jahn-junior]

If a Pydantic field is modified and the rST remains unchanged, you must run make clean before make docs. Otherwise, Sphinx will not rebuild the document, as the reStructuredText has not changed.

This behavior diverges from autodoc, which renders changes to docstrings regardless of whether the rST has been modified or not.

This change would make iterating on kitbash documents locally much easier and less cumbersome.

[medubelko]

Update on this: in Snapcraft, even running make clean isn't a workaround. Sphinx's cache is still preserved, and it waits for the reST source to change. Quite a frustrating workflow.