scene update for Mirage Oasis, new link in yaml

Adds a sound effect when the switch is pressed.

Author: phellen007

src/data/backgrounds.yml

@@ -1226,7 +1226,7 @@
   name: Giant Beanstalk
 - background: pacparty_mirageoasis
   download:
-  - https://nikkums.io/cswt/Backgrounds/pacparty_mirageoasis.background.zip
+  - https://drive.google.com/uc?export=download&id=1JlGd4jFrRQqPyyjNbaSfblxcT9Dd4yf7
   mapIcon: pacparty_p804
   name: Mirage Oasis
 - background: bg109altSE