fix capitalization in the music link

Author: phellen007

_maps/pacparty_mirageoasis/pacparty_mirageoasis.yaml

@@ -22,7 +22,7 @@ background: pacparty_mirageoasis
 mapIcon: pacparty_p804
 music:
   download:
-  - https://nikkums.io/cswt/BGM/PACPARTY_mirageoasis.music.zip
+  - https://nikkums.io/cswt/BGM/pacparty_mirageoasis.music.zip
   - https://drive.google.com/uc?export=download&id=1R79V97CYAhyw9CPVoDjSHv9bpKxbGhdM
   map: 
   - PACPARTY_mirageoasis_MAP_0