The images are broken on the docs page, [Light and dark themes](https://pydata-sphinx-theme.readthedocs.io/en/latest/user_guide/light-dark.html). This seems related to https://github.com/pydata/pydata-sphinx-theme/pull/2190, which replaced URLs to Unsplash images with Picsum. So maybe we should do the same with that page. Or maybe upload actual images to the repo to avoid this issue recurring in the future? Once this is fixed the ["unsplash.com" entry in the linkcheck_ignore list](https://github.com/pydata/pydata-sphinx-theme/blob/main/docs/conf.py#L379) in conf.py should be removed.