Fix typo in PC FX

emus/settings.py

@@ -323,7 +323,7 @@ GAME_SYSTEM_DEFAULTS = {
         "color": "55B4CC",
         "retroarch_core": "mednafen_supergrafx",
     },
-    "pcengine": {
+    "pcfx": {
         "name": "PC FX",
         "color": "55B4CC",
         "retroarch_core": "mednafen_pcfx",