chore(deps-dev): bump koishi from 4.17.7 to 4.17.9 (#61)

Bumps [koishi](https://github.com/koishijs/koishi) from 4.17.7 to 4.17.9.
- [Release notes](https://github.com/koishijs/koishi/releases)
- [Commits](https://github.com/koishijs/koishi/commits)

---
updated-dependencies:
- dependency-name: koishi
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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