Update a FormFieldPosition

curl --request PUT \
  --url https://api.rootly.com/v1/form_field_positions/{id} \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/vnd.api+json' \
  --data '
{
  "data": {
    "type": "form_field_positions",
    "attributes": {
      "form_field_id": "<string>",
      "form": "web_new_incident_form",
      "position": 123
    }
  }
}
'

{
  "data": {
    "id": "18b5afeb-0809-4e2d-9efb-346074def432",
    "type": "form_field_positions",
    "attributes": {
      "form_field_id": "79d3e003-bada-4fd2-a4fc-e1e2b939a87c",
      "form": "web_update_incident_form",
      "position": 2
    }
  }
}