Ender 3 NG v1.2 reinforced BLTouch probe mount

This is a BLTouch probe mount with thicker screw rails. The original BLTouch mount on my Ender 3 NG v1.2 cracked where the screws were mounted twice (my 68C chamber temps probably contributed), so I thought I'd thicken the screw rails to make them stronger. The width of the mount is the same in this model, so no probe locations need to be updated.