Bump go_router from 3.1.1 to 4.0.0 in /boring_to_beautiful/step_06 (#975)
Bump go_router from 3.1.1 to 4.0.0 in /boring_to_beautiful/step_06 (#975)

Bumps [go_router](https://github.com/flutter/packages/tree/main/packages) from 3.1.1 to 4.0.0.
- [Release notes](https://github.com/flutter/packages/releases)
- [Commits](https://github.com/flutter/packages/commits/go_router-v4.0.0/packages)

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

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>

Co-authored-by: dependabot[bot] <1c358da00a777d4e9898c1280ab801e2df165188@users.noreply.github.com>
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