Fix issue with author images not filling container height

[uus-dev]

Without this some author avatars became squeezed if the avatar image didn't fill the container height.

Before	After

[squidfunk]

Thanks for the PR. Please provide a minimal reproduction. The problem with height: 100% is that it will stretch non-rectangular images. We should use height: auto here, but that's already defined for images, which will scale the image to adapt to aspect-ratio. For the author avatars, this should be a square:

https://github.com/squidfunk/mkdocs-material/blob/8ee7137e48bd59ef451b20fb14c6c86fa6132da1/src/templates/assets/stylesheets/main/_typeset.scss#L371-L377

Please provide a reproduction with exact steps how to observe the issue, because I'm not seeing it.

[squidfunk]

Closing as stale.