Bump shibuya from 2025.2.20 to 2025.2.28

Bumps [shibuya](https://github.com/lepture/shibuya) from 2025.2.20 to 2025.2.28.
- [Release notes](https://github.com/lepture/shibuya/releases)
- [Changelog](https://github.com/lepture/shibuya/blob/main/docs/changelog.rst)
- [Commits](lepture/shibuya@2025.2.20...2025.2.28)

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

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

Author: dependabot[bot]