Add machine ID to Supervisor root info (#127)

* Add machine ID to Supervisor root info

* Fix pytest

Author: agners

aiohasupervisor/models/root.py

@@ -86,6 +86,7 @@ class RootInfo(ResponseData):
     operating_system: str | None
     features: list[HostFeature | str]
     machine: str | None
+    machine_id: str | None
     arch: str
     state: SupervisorState
     supported_arch: list[str]

tests/fixtures/root_info.json

@@ -23,6 +23,7 @@
       "not_real"
     ],
     "machine": "odroid-n2",
+    "machine_id": "2403f24a7b9840c0a6c63ae9357948e8",
     "arch": "aarch64",
     "state": "running",
     "supported_arch": ["aarch64", "armv7", "armhf"],