Retrieves a retrospective step

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

{
  "data": {
    "id": "56fac461-3a8b-4073-a2ac-e6e9128ccda8",
    "type": "retrospective_steps",
    "attributes": {
      "retrospective_process_id": "619cfdd0-6787-4d23-92ee-d79f16c0bd56",
      "title": "Step 11",
      "description": "Bar",
      "incident_role_id": "9f69409d-fddc-4446-a2cb-bb01a642c504",
      "due_after_days": null,
      "position": 1,
      "skippable": true,
      "created_at": "2026-02-16T02:10:00.831-08:00",
      "updated_at": "2026-02-16T02:10:00.831-08:00"
    }
  }
}