add back doc generation

[yliaog]

fix https://app.readthedocs.org/projects/kubernetes/

#2529 simply removed it

[roycaihw]

/assign @yliaog

[rorikuqu07421-pixel]

To restore the documentation generation, you can reintroduce the appropriate configuration in the readthedocs.yml file for your project. Make sure to specify the correct requirements in the requirements.txt and ensure that the correct builder (such as Sphinx) is being used in the settings. Additionally, confirm that any necessary scripts or commands to build the documentation are included and properly referenced in the deployment process.

[yliaog]

@rorikuqu074h21-pixel do you have time to help resolving this issue?