chore(deps): bump go_router in /packages/oidc/example

Bumps [go_router](https://github.com/flutter/packages/tree/main/packages) from 12.1.3 to 13.2.2.
- [Release notes](https://github.com/flutter/packages/releases)
- [Commits](https://github.com/flutter/packages/commits/go_router-v13.2.2/packages)

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

Signed-off-by: dependabot[bot] <support@github.com>

packages/oidc/example/pubspec.yaml

@@ -12,7 +12,7 @@ dependencies:
   dio: ^5.3.3
   flutter:
     sdk: flutter
-  go_router: ^12.0.1
+  go_router: ^13.2.2
   http: ^1.1.0
   logging: ^1.2.0
   oidc: