Retrieves a retrospective step

curl --request GET \
  --url https://api.rootly.com/v1/retrospective_steps/{id} \
  --header 'Authorization: Bearer <token>'

{
  "data": {
    "id": "18220b79-24fe-41fe-9d50-135da2a528a9",
    "type": "retrospective_steps",
    "attributes": {
      "retrospective_process_id": "0ebf3c00-6006-4fd3-9976-d5288e321098",
      "title": "Step 11",
      "description": "Bar",
      "incident_role_id": "8db75a8b-223f-4a9a-970c-912e1103a63f",
      "due_after_days": null,
      "position": 1,
      "skippable": true,
      "created_at": "2025-06-20T12:45:12.574-07:00",
      "updated_at": "2025-06-20T12:45:12.575-07:00"
    }
  }
}