Retrieves a retrospective step

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

{
  "data": {
    "id": "9e79b28c-723c-41ec-914e-4c9f0b49d6ec",
    "type": "retrospective_steps",
    "attributes": {
      "retrospective_process_id": "238130a4-1dcb-469d-8778-555a8e87afb2",
      "title": "Step 11",
      "description": "Bar",
      "incident_role_id": "3eca5aae-ed27-403b-b545-165e102f747d",
      "due_after_days": null,
      "position": 1,
      "skippable": true,
      "created_at": "2025-10-20T08:33:53.045-07:00",
      "updated_at": "2025-10-20T08:33:53.045-07:00"
    }
  }
}