Retrieves a retrospective step

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

{
  "data": {
    "id": "64f8ae51-afec-4a99-8f3f-5e92f4d806cb",
    "type": "retrospective_steps",
    "attributes": {
      "retrospective_process_id": "e73e9726-50eb-49db-83af-ac5d55198dd3",
      "title": "Step 11",
      "description": "Bar",
      "incident_role_id": "da3d3a20-de29-4fc1-8816-d6393ebc1271",
      "due_after_days": null,
      "position": 1,
      "skippable": true,
      "created_at": "2025-06-30T14:34:33.526-07:00",
      "updated_at": "2025-06-30T14:34:33.526-07:00"
    }
  }
}