DOCS-3240: Add mention of state field in machine status (#822)

Author: npentrel

src/viam/robot/client.py

@@ -921,6 +921,7 @@ async def get_machine_status(self) -> GetMachineStatusResponse:
             machine_status = await machine.get_machine_status()
             resource_statuses = machine_status.resources
             config_status = machine_status.config
+            machine_state = machine_status.state
 
         Returns:
             viam.proto.robot.GetMachineStatusResponse: current status of the resources (List[ResourceStatus]) and config of the machine.