Undertale: Fixed output location of the patched game in UndertaleClient.py

[dennisw100]

Fixed the error that when the client is opened outside of the archipelago folder, the patched folder would be created in there instead of the ap folder, which on windows ends up trying to create it in the system32 folder

Bug Report: https://discord.com/channels/731205301247803413/1148330675452264499/1237412436382973962

[ThePhar]

@jonloveslegos