Some broken doc links

[cocochpie]

These are broken

• https://github.com/spr-networks/super/blob/main/README.md?plain=1#L114-L116

  Documentation Home: https://www.supernetworks.org/pages/docs/intro/  (need to remove last slash character)
  Raspberry Pi 4 Setup https://www.supernetworks.org/pages/docs/pi4b  (/setup_guides/ is missing)
  General Setup Guide https://www.supernetworks.org/pages/docs/setup_run_spr  (/setup_guides/ is missing)

OUI vendor list is now 404 - https://www.supernetworks.org/pages/docs/services/plugin_lookup

• https://www.wireshark.org/download/automated/data/manuf

[lts-po]

Thanks! Fixed now in dev & will merge