[Suggestion] Update OreSim to use 1.21 seeds.

[GigaZelensky]

Describe the feature

OreSim only uses seeds up to 1.20, and 1.21 is out and it's not supported when I do .seed ***** 1.21

[EpicE870]

oresim also renders false ores, maybe they can add a check where if the vein is touching the last y of the world it gets dismissed as false positive

[1523789353]

I found the same problem. The only way I can use xray is by spamming the '.aax 12' command in the chat. Even so, Ancient Debris are still hard to find.