Fix 3DS emulator

emus/settings.py

@@ -216,7 +216,7 @@ GAME_SYSTEM_DEFAULTS = {
     },
     "3ds": {
         "name": "Nintendo 3DS",
-        "emulator": "drastic",
+        "retroarch_core": "citra",
     },
     "atarijaguar": {
         "name": "Atari Jaguar",