Update incident_sub_status

curl --request PUT \
  --url https://api.rootly.com/v1/incident_sub_statuses/{id} \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/vnd.api+json' \
  --data '
{
  "data": {
    "type": "incident_sub_statuses",
    "attributes": {
      "sub_status_id": "<string>",
      "assigned_at": "<string>",
      "assigned_by_user_id": 123
    }
  }
}
'

{
  "data": {
    "id": "31530de2-a53c-4ef3-8503-f246ed43c797",
    "type": "incident_sub_statuses",
    "attributes": {
      "sub_status_id": "6033df63-b52a-4cb4-8455-9a5fb7bb3e2c",
      "incident_id": "05f957ab-5935-4ee5-8aae-078e1a2f3eff",
      "assigned_at": "2026-02-05T20:20:44.000-08:00",
      "assigned_by_user_id": 667
    },
    "relationships": {
      "sub_status": {
        "data": {
          "id": "6033df63-b52a-4cb4-8455-9a5fb7bb3e2c",
          "type": "sub_statuses"
        }
      },
      "assigned_by_user": {
        "data": {
          "id": "667",
          "type": "users"
        }
      }
    }
  }
}