Retrieves a retrospective step

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

{
  "data": {
    "id": "5a042989-b731-4053-a913-ff0106a52d13",
    "type": "retrospective_steps",
    "attributes": {
      "retrospective_process_id": "33ece87a-b7ec-466d-9073-85da9db7ccbf",
      "title": "Step 11",
      "description": "Bar",
      "incident_role_id": "5dab0aa4-6551-44b0-b6da-e0afa1345f5d",
      "due_after_days": null,
      "position": 1,
      "skippable": true,
      "created_at": "2025-08-08T21:54:31.032-07:00",
      "updated_at": "2025-08-08T21:54:31.032-07:00"
    }
  }
}