Yoshi Cloud NL background hotfix

Author: Ennesan

src/data/backgrounds.yml

@@ -1241,7 +1241,7 @@
   - https://nikkums.io/cswt/Backgrounds/bg102fixed.background.zip
   mapIcon: bg102fixed
   name: bg102fixed
-- background: bg001_yc
+- background: bg001_YC
   download:
   - https://nikkums.io/cswt/Backgrounds/bg001_YC.background.zip
   mapIcon: bg001_YC