[talk-au] Update on NearMap wiki page

[John Smith]

Someone left a note about the NearMap imagery should be aligned with
existing ways, but in a lot of cases the opposite is true, most of the
ways that don't line up that I've seen are inaccurate.

Even with the poorly aligned Melbourne imagery Ross was still saying
the imagery was at most only 6m out, which is on par with most
consumer grade GPS devices.