Retrieves a retrospective step

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

{
  "data": {
    "id": "79876d9f-a3a2-4f85-b789-03f19fb6c8b8",
    "type": "retrospective_steps",
    "attributes": {
      "retrospective_process_id": "d019d8e4-0943-4256-9a3d-a24cfa98f28a",
      "title": "Step 11",
      "description": "Bar",
      "incident_role_id": "41be98cb-c45e-456a-a176-82f21a9f600e",
      "due_after_days": null,
      "position": 1,
      "skippable": true,
      "created_at": "2026-02-07T16:50:19.803-08:00",
      "updated_at": "2026-02-07T16:50:19.803-08:00"
    }
  }
}