Bump shibuya from 2025.4.25 to 2025.5.30

Bumps [shibuya](https://github.com/lepture/shibuya) from 2025.4.25 to 2025.5.30.
- [Release notes](https://github.com/lepture/shibuya/releases)
- [Changelog](https://github.com/lepture/shibuya/blob/main/docs/changelog.rst)
- [Commits](lepture/shibuya@2025.4.25...2025.5.30)

---
updated-dependencies:
- dependency-name: shibuya
  dependency-version: 2025.5.30
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]