Bump auto_route and auto_route_generator in /example

Bumps [auto_route](https://github.com/Milad-Akarie/auto_route_library) and [auto_route_generator](https://github.com/Milad-Akarie/auto_route_library). These dependencies needed to be updated together.

Updates `auto_route` from 8.3.0 to 9.2.0
- [Changelog](https://github.com/Milad-Akarie/auto_route_library/blob/master/CHANGELOG.md)
- [Commits](https://github.com/Milad-Akarie/auto_route_library/commits)

Updates `auto_route_generator` from 8.1.0 to 9.0.0
- [Changelog](https://github.com/Milad-Akarie/auto_route_library/blob/master/CHANGELOG.md)
- [Commits](https://github.com/Milad-Akarie/auto_route_library/commits)

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

Signed-off-by: dependabot[bot] <[email protected]>

example/pubspec.yaml

@@ -9,12 +9,12 @@ dependencies:
   flutter_web_plugins:
     sdk: flutter
   faker: ^2.1.0
-  auto_route: ^8.1.3
+  auto_route: ^9.2.0
   visibility_detector: ^0.4.0+2
   seo:
     path: ../
 
 dev_dependencies:
   flutter_lints: ^4.0.0
-  auto_route_generator: ^8.0.0
+  auto_route_generator: ^9.0.0
   build_runner: ^2.4.10