Bump shibuya from 2024.12.15 to 2024.12.20

Bumps [shibuya](https://github.com/lepture/shibuya) from 2024.12.15 to 2024.12.20.
- [Release notes](https://github.com/lepture/shibuya/releases)
- [Changelog](https://github.com/lepture/shibuya/blob/master/docs/changelog.rst)
- [Commits](https://github.com/lepture/shibuya/commits/2024.12.20)

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

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