DOC: Add example with ``numpy_nullable`` to ``pd.read_html()``
- [x] [closes](https://github.com/noatamir/pyladies-berlin-sprints/issues/4)
Given ```See the :ref:`read_html documentation in the IO section of the docs <io.read_html>` for some examples of reading in HTML tables.``` I am not sure if I can or should move this. > Given `` See the :ref:`read_html documentation in the IO section of the docs <io.read_html>` for some examples of reading in HTML tables. `` I am not sure if I can or should move this.

It would be good to move those examples in the user guide to the docstring I moved several examples.