Clarify mounting locations of some parts (VZ330 Mellow)

[HumbleDeer]

As mentioned on Nero3D's live stream: https://youtube.com/live/8qPVFJY3D40

• Endstop switches
  Whereas the 235 version has information on this, the 330 version does not: https://docs.vzbot.org/vz235_alu/gantry/endstop

[simonvez]

you want to add it to the doc ?

[HumbleDeer]

We still need to check whether it is already there, how we'll clarify it, and whether we'll do it after some restructuring of the docs or not.

[HumbleDeer]

As per @1980alexGS

Y end stop - this is actually not shown anywhere in the docs. I think it should be installed at the same time as the gantry. Endstop switches were provided in my kit, in the same box as the SSR bracket and the rubber feet :)

#55 (comment)