Fix FDS wrong retroarch core

emus/settings.py

@@ -243,7 +243,7 @@ GAME_SYSTEM_DEFAULTS = {
     "fds": {
         "name": "Famicom Disc System",
         "color": "B70E30",
-        "retroarch_core": "genesis_plus_gx",
+        "retroarch_core": "nestopia",
     },
     "gb": {
         "name": "Game Boy",