Update zbus requirement from 4 to 5

Updates the requirements on [zbus](https://github.com/dbus2/zbus) to permit the latest version.
- [Release notes](https://github.com/dbus2/zbus/releases)
- [Commits](dbus2/zbus@zbus-4.0.0...zbus-5.0.1)

---
updated-dependencies:
- dependency-name: zbus
  dependency-type: direct:production
...

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

Cargo.toml

@@ -37,18 +37,18 @@ security-framework = { version = "2", optional = true }
 
 [target.'cfg(target_os = "linux")'.dependencies]
 secret-service = { version = "4", optional = true }
-zbus = { version = "4", optional = true }
+zbus = { version = "5", optional = true }
 linux-keyutils = { version = "0.2", features = ["std"], optional = true }
 dbus-secret-service = { version = "4.0.0-rc.2", optional = true }
 
 [target.'cfg(target_os = "freebsd")'.dependencies]
 secret-service = { version = "4", optional = true }
-zbus = { version = "4", optional = true }
+zbus = { version = "5", optional = true }
 dbus-secret-service = { version = "4.0.1", optional = true }
 
 [target.'cfg(target_os = "openbsd")'.dependencies]
 secret-service = { version = "4", optional = true }
-zbus = { version = "4", optional = true }
+zbus = { version = "5", optional = true }
 dbus-secret-service = { version = "4.0.0-rc.1", optional = true }
 
 [target.'cfg(target_os = "windows")'.dependencies]