Holes wrong size

[MDK5537]

Holes use the diameter instead of radius, resulting in holes being twice intended size.

[MDK5537]

Perhaps line 91 of psu-bracket.ts should be:

const singleHole = Manifold.cylinder(BRACKET_THICKNESS + RIBBING_HEIGHT, HOLE_DIAMETER / 2, HOLE_DIAMETER / 2, 100).rotate([0, 90, 90])