Remove trailing / for KiCad version >8.0.5

[rubenbaldewsing]

faebryk/src/faebryk/exporters/pcb/kicad/artifacts.py

Line 114 in 70ab7b2

out_dir = temp_dir if temp_dir.endswith("/") else f"{temp_dir}/"

This should not be needed anymore from KiCad 8.0.5 onward

Both folder names with and without / are valid now so it is not really a bug to be fixed and we are backwards compatible now.