Retrieves a retrospective step

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

{
  "data": {
    "id": "247b1989-1cd8-4ab7-97a9-0726c94f4a31",
    "type": "retrospective_steps",
    "attributes": {
      "retrospective_process_id": "b89cd22f-9d9e-4c8a-ae90-44bec30d58d8",
      "title": "Step 11",
      "description": "Bar",
      "incident_role_id": "82849623-a435-4c66-afc9-9e0b25002b68",
      "due_after_days": null,
      "position": 1,
      "skippable": true,
      "created_at": "2025-07-20T00:42:38.731-07:00",
      "updated_at": "2025-07-20T00:42:38.731-07:00"
    }
  }
}