Fix save directory for PSX

PCSX ReARMed save directory on MUOS has a dash instead of a space

Author: klinkertinlegs

cfw/muos/data/save_directories.json

@@ -275,7 +275,7 @@
     "file/PPSSPP"
   ],
   "psx": [
-    "file/PCSX ReARMed",
+    "file/PCSX-ReARMed",
     "file/Beetle PSX",
     "file/DuckStation",
     "file/SwanStation"