Retrieves a retrospective step

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

{
  "data": {
    "id": "03cca3d8-9d08-407c-bf9a-b6ba77094ac4",
    "type": "retrospective_steps",
    "attributes": {
      "retrospective_process_id": "8e59ad9d-3f89-4f50-b7f8-8e74889be1bc",
      "title": "Step 11",
      "description": "Bar",
      "incident_role_id": "ddfa791c-e6f6-4a4f-9d0d-e0d97b3037a2",
      "due_after_days": null,
      "position": 1,
      "skippable": true,
      "created_at": "2026-01-16T12:43:44.349-08:00",
      "updated_at": "2026-01-16T12:43:44.349-08:00"
    }
  }
}