pcbnew.IO_MGR has been renamed to pcbnew.PCB_IO_MGR
A change between the KiCad 7 and 8 series is that in the pcbnew
Python module, IO_MGR
has been renamed to PCB_IO_MGR
. Since the GitLab CI/CD pipeline for the footprints repository now uses KiCad 8.0.0, update the relevant script to reflect this change.