Changes

Hey recently an updated higan accuracy snes core was added to retroarch with a balanced core on the way and they need the super game boy bios in a different location to work. Here's a small zip with the SGB and SGB2 bios already setup and showing where they need to go. If this can also be added to the retroarch bios zip I think it'll help a lot of people having trouble. https://www.mediafire.com/file/g3559n85benjvhe/sgb.zip