fix: remove invalid store_app_id from GeoGuesser AI config

The store_app_id field was incorrectly placed in the global x-casaos
section, causing "app not found" errors during installation. This field
is not needed based on working app examples (tududi) and was preventing
the app from being installed.

Fixes installation error: "app not found"

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Apps/geoguesser-ai/docker-compose.yml

@@ -151,6 +151,5 @@ x-casaos:
   index: /
   port_map: "8080"
   scheme: http
-  store_app_id: geoguesser-ai
   title:
     en_us: GeoGuesser AI