Integrate meta-guf-machine/cherry-pick-1ab3758a

Commit: https://git.seco.com/seco-ne/yocto/layers/meta-guf-machine/-/commit/1c854b1415a4259edf1c182b3c7b8d0b6cfb4eba

readme: Update and clean-up

• Updated old infos
• Renamed G&F to SECO North
• Updated URLs
• Fixed some spelling errors

(cherry picked from commit 1ab3758ae59ab4a6593aa17d7726c27bff60042f)