fix: removed parameter

Author: TheyCreeper

src/playbook/Configuration/tweaks/qol/appearance/atlas-theme.yml

@@ -30,7 +30,6 @@ actions:
     value: 'WallPaper'
     data: 'C:\Windows\AtlasModules\Wallpapers\atlas-v0.4.x-dark.png'
     type: REG_SZ
-    onUpgrade: false
 
   - !powerShell:
     command: |