New sphinx version fails to build documentation

In using Sphinx 9.0.3 breaks the documentation. I will set the documentation to show the 0.4.1 version.

The problem seems to be the sphinx_toolbox extension. We do not use the functionality in gordias and should remove this dependency.

  File "/home/docs/checkouts/readthedocs.org/user_builds/gordias/conda/v0.4.2/lib/python3.14/site-packages/sphinx/registry.py", line 546, in load_extension
    raise ExtensionError(
        __('Could not import extension %s') % extname, err
    ) from err
sphinx.errors.ExtensionError: Could not import extension sphinx_toolbox.collapse (exception: cannot import name 'logger' from 'sphinx.ext.autodoc' (/home/docs/checkouts/readthedocs.org/user_builds/gordias/conda/v0.4.2/lib/python3.14/site-packages/sphinx/ext/autodoc/__init__.py))