Mark exact spawn tile of Countess Sorrow

[mathiasbynens]

This doesn't prove it always spawns on this exact tile; it could still be a hardcoded sqm with a random radius around it. But either way we can move our approximated marker to this spot.

Our current marker is here: https://tibiamaps.io/map#32797,32372,15:2 The spawn sqm in the screenshot seems to be https://tibiamaps.io/map#32794,32364,15:4.