chore(deps): Bump @nextcloud/calendar-availability-vue

Bumps [@nextcloud/calendar-availability-vue](https://github.com/nextcloud/calendar-availability-vue) from 0.5.0-rc2 to 0.6.0-alpha1.
- [Release notes](https://github.com/nextcloud/calendar-availability-vue/releases)
- [Changelog](https://github.com/nextcloud/calendar-availability-vue/blob/main/CHANGELOG.md)
- [Commits](https://github.com/nextcloud/calendar-availability-vue/compare/v0.5.0-rc2...v0.6.0-alpha1

)

---
updated-dependencies:
- dependency-name: "@nextcloud/calendar-availability-vue"
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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