Retrieves a FormFieldPosition

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

{
  "data": {
    "id": "255516d5-3a79-4b18-bdcb-91786a7e32c8",
    "type": "form_field_positions",
    "attributes": {
      "form_field_id": "227f38a3-936b-4445-863c-bffb0aea31db",
      "form": "web_update_incident_form",
      "position": 1
    }
  }
}