Deactivate the Quarto tests on the CI

[mwouts]

This is a temporary change until we find the proper fix to #1255

[github-actions]

Thank you for making this pull request.

Did you know? You can try it on Binder: or .

Also, the version of Jupytext developed in this PR can be installed with pip:

HATCH_BUILD_HOOKS_ENABLE=true pip install git+https://github.com/mwouts/jupytext.git@deactivate_quarto_on_the_CI

(this requires nodejs, see more at Developing Jupytext)