Huge logos

[jeroen]

Due to some css change, all images have height: auto now which blows them up.

• https://docs.ropensci.org/treeio/
• https://docs.ropensci.org/photosearcher/

[maelle]

Maybe the easiest way to solve this, as they are logos, is for me to make PRs that standardize their logo usage :thinking: