Corner screw holes aren't symmetric

[brndd]

I don't know if this is intentional, but it seems like the corner screw holes are slightly off-kilter (on the order of 0.1-0.2 mm in various directions). This made it a little bit annoying to 3D print a stand for the board.

[FeralAI]

Not by design, just a newb doing work in KiCad 😁

I don't plan to update the design, but if there is a PR with fixes I'm glad to review and merge.