Add example config.yml entries for autodoc-2

[s2t2]

Describe the gap in the current documentation

Goal is to create auto documentation. The docs recommend sphinx-autodoc2 but they don't provide example content to include in the "_config.yml" file.

What content do you put in the "_config.yml" file to make sphinx-autodoc2 work?

Describe the solution you'd like

Add to the docs on the page referenced the content necessary for the "config.yml" in order to make autodoc2 work.