Bump zbus from 4.1.2 to 4.2.0

Bumps [zbus](https://github.com/dbus2/zbus) from 4.1.2 to 4.2.0.
- [Release notes](https://github.com/dbus2/zbus/releases)
- [Commits](dbus2/zbus@zbus-4.1.2...zbus-4.2.0)

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

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