Wrong example for sending a command about python-matter-server

[farshidtz]

The JSON object for the On command should be, for example:

{
    "message_id": "4",
    "command": "device_command",
    "args": {
      "endpoint_id": 1,
      "node_id": 1,
      "payload": {},
      "cluster_id": 6,
      "command_name": "On"
    }
}

[marcelveldt]

You can have a look at the included client for a reference implementation, together with Home Assistant.