Atom m5 Pinout - Docs updating?

[daaaaan]

Firstly thanks for this project. I've just come on board.

A slight gotcha for the atom pinout as they seem to differ from the example.yaml

TXD = G26 and RXD = G32 on some boards if you're using the tail + atom from pihut.

https://thepihut.com/products/atom-tail485

Thanks!

[lanwin]

@daaaaan dank you for your feedback. I extended the example.yaml.