Update page listing goBILDA mecanums

[abidingabi]

Since goBILDA has released new mecanums (and discontinued their old ones), it is worth adding them to https://gm0.org/en/latest/docs/common-mechanisms/drivetrains/holonomic.html#recommended. It makes sense to wait for some people to test them first, this is mostly just a note that this needs to be done eventually.