Update a retrospective step

curl --request PUT \
  --url https://api.rootly.com/v1/retrospective_steps/{id} \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/vnd.api+json' \
  --data '
{
  "data": {
    "type": "retrospective_steps",
    "attributes": {
      "title": "<string>",
      "description": "<string>",
      "incident_role_id": "<string>",
      "due_after_days": 123,
      "position": 123,
      "skippable": true
    }
  }
}
'

{
  "data": {
    "id": "badf3bdd-c53c-47d5-8484-8e42a86648b9",
    "type": "retrospective_steps",
    "attributes": {
      "retrospective_process_id": "b98215ad-a5c9-4750-ba79-43f4e1e00fed",
      "title": "Step 2",
      "description": "Step 2 description",
      "incident_role_id": "360836fe-eeed-408b-914d-0df548d61ca2",
      "due_after_days": 7,
      "position": 2,
      "skippable": true,
      "created_at": "2026-01-27T15:33:24.442-08:00",
      "updated_at": "2026-01-27T15:33:26.200-08:00"
    }
  }
}