chore(deps): bump go_router from 5.2.4 to 6.5.9

Bumps [go_router](https://github.com/flutter/packages/tree/main/packages) from 5.2.4 to 6.5.9.
- [Release notes](https://github.com/flutter/packages/releases)
- [Commits](https://github.com/flutter/packages/commits/go_router-v6.5.9/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>