M3 mounting screws cause electrical short

Issue: There is a positive and negative 12v connection close enough to the mounting screw holes that using an m3 screw instead of an m2.5 screw will cause a short. I found this out when my board started _glowing_ by the mounting hole next to the USB C and smoke came out. Earlier a spark came from the hole on the other side of the SD card.

Since this is a 3D printer board above all and m3 screws fit with minimal resistance, this is a major cause for concern. The fix should be easy though: just add a little more clearance between power and GND.

I would love to recommend this board to my friends, but I can't do that with an easy short right there. Can we get a fix?

Inspect the board layout around the mounting holes, USB-C connector, and SD-card side, focusing on the nearby positive, negative, and ground connections. Confirm the clearance needed for M3 hardware and verify that the revised layout prevents shorts before treating the issue as done.

Written by the indexing model from the issue text.