Fix a canyon warp

Note: I initially believed this was supposed to go to the warp-less cave @ 010-1 61 57, but it seems the other warp is supposed to reach that cave.

This is a replacement for serverdata!135 (closed)

First time using Tiled. Idk if there's anything else to do here?

(Also, since it's been so long I no longer remember the exact issue)