kernelspec and kernel_info

Hi,

I'm reading the docs for v4.4 where it mentions that kernel information is stored under the "kernel_info" key: https://nbformat.readthedocs.io/en/4.4.0/format_description.html#top-level-structure

However, the JSON spec does not mention this section, but rather a "kernelspec" section: https://github.com/jupyter/nbformat/blob/master/nbformat/v4/nbformat.v4.4.schema.json

Is this an error in the docs?

Compare the v4.4 format documentation at the linked top-level-structure section with nbformat/v4/nbformat.v4.4.schema.json. Determine whether “kernel_info” versus “kernelspec” is a documentation error or an intentional distinction, then make the documentation and schema terminology consistent or explain the distinction clearly.

Written by the indexing model from the issue text.