Required Wiring Doc Update

[TheBrigandier]

Hello,

Submitting this issue on the request of btechnet at the 602 Discord. The docs reference the following:

The VIN, GND, STP, and DIR should be connected to the pins on the NZS with the same names. The
above diagram shows the connection for the X axis on the RAMPS only, the other axis have similar
wiring.
The RAMPS boards have 5V logic levels, hence the VIN pin should be connected to the 5V VIN pin on the
RAMPS board. Other boards like Smoothie which uses 3.3V logic will have slightly different wiring.

He advised that this is now incorrect and docs may need to be adjusted, in regards to VIN.

Thanks

[coolio986]

@trampas, the docs state that the board needs 5v at VIN. With the new on-board 5v regulator is that needed anymore? The buffered pins are all pullup, not sure if we still need the 5v ref.