Creates an alert urgency

curl --request POST \
  --url https://api.rootly.com/v1/alert_urgencies \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/vnd.api+json' \
  --data '{
  "data": {
    "type": "alert_urgencies",
    "attributes": {
      "name": "<string>",
      "description": "<string>",
      "position": 123
    }
  }
}'

{
  "data": {
    "id": "c72f97ad-dde9-4350-a37f-46281bd12b96",
    "type": "alert_urgencies",
    "attributes": {
      "name": "High",
      "description": "Hight alert urgency",
      "position": 1,
      "created_at": "2025-08-26T21:10:40.707-07:00",
      "updated_at": "2025-08-26T21:10:40.707-07:00"
    }
  }
}