Retrieves a retrospective step

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

{
  "data": {
    "id": "1d852c03-5677-450d-83e1-b817c7061f40",
    "type": "retrospective_steps",
    "attributes": {
      "retrospective_process_id": "b618eaac-d9a9-4e8e-9909-cbf3693f82d0",
      "title": "Step 11",
      "description": "Bar",
      "incident_role_id": "a9bf229e-ff07-4cf0-9c61-c8e5967cc897",
      "due_after_days": null,
      "position": 1,
      "skippable": true,
      "created_at": "2025-11-21T14:33:46.094-08:00",
      "updated_at": "2025-11-21T14:33:46.094-08:00"
    }
  }
}