cad/kicad: update to 6.0.1

Major Release 6.0.0:
  https://www.kicad.org/blog/2021/12/KiCad-6.0.0-Release/
Bugfix Release 6.0.1:
  https://www.kicad.org/blog/2022/01/KiCad-6.0.1-Release/

PR:		261290
Reported by:	Kevin Zheng
Submitted by:	Kevin Zheng

This also updates the libraries and doc ports. As the docs distfile
for version 6.0.1 is not available yet, keep that at version 6.0 for
the time being.