Retrieves a retrospective step

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

{
  "data": {
    "id": "5be9ef07-4521-4293-9f72-2c92dcace954",
    "type": "retrospective_steps",
    "attributes": {
      "retrospective_process_id": "3c755588-0cfa-4243-acce-da3a2e6b3a6a",
      "title": "Step 11",
      "description": "Bar",
      "incident_role_id": "a561f04d-98f2-4b53-a8f1-f73a325f89e3",
      "due_after_days": null,
      "position": 1,
      "skippable": true,
      "created_at": "2025-06-18T22:03:57.106-07:00",
      "updated_at": "2025-06-18T22:03:57.106-07:00"
    }
  }
}