Documentation Link

https://github.com/matplotlib/matplotlib/blob/main/galleries/examples/misc/logos2.py

Problem

We now have a dark version that should be in the logo example as a toggle.

The logo example should have "logo_light.svg" and "logo_dark.svg" somewhere in the text so its searchable by the name of the files that get used in the site logo.

See matplotlib/mpl-sphinx-theme#62