Bump go_router from 5.2.4 to 6.0.1 in /game_template (#1566)

Bumps [go_router](https://github.com/flutter/packages/tree/main/packages) from 5.2.4 to 6.0.1.
- [Release notes](https://github.com/flutter/packages/releases)
- [Commits](https://github.com/flutter/packages/commits/go_router-v6.0.1/packages)

---
updated-dependencies:
- dependency-name: go_router
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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game_template/pubspec.yaml

@@ -15,7 +15,7 @@ dependencies:
 
   audioplayers: ^1.1.0
   cupertino_icons: ^1.0.2
-  go_router: ^5.2.1
+  go_router: ^6.0.1
   logging: ^1.1.0
   provider: ^6.0.2
   shared_preferences: ^2.0.13