First example images not properly clickable in readme

[adeak]

I just came across this project, looks really neat. Especially the smooth contourf got me curious.

I've noticed in the readme that (at least on firefox) if I click any of the three images, the link that opens (even with the "open image in new tab" context menu option) is https://github.com/nschloe/matplotx/blob/main/tests/dufte_comparison.py. In contrast, the contourf images open just fine, for instance.

I assume the reason for this is the enclosing a tag for the first example: https://github.com/nschloe/matplotx/blob/c767b08ea91492b1db9626b8b2c8786b4bc99458/README.md?plain=1#L39

In case this is not just a firefox thing, I would recommend trying to make the first three images clickable on their own right.