Retrieves a FormFieldPosition

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

{
  "data": {
    "id": "57dcd6cc-f1d9-4198-a8eb-f7548adfc516",
    "type": "form_field_positions",
    "attributes": {
      "form_field_id": "bcd4ae69-62a6-42fd-bf61-ee863148e989",
      "form": "web_new_incident_form",
      "position": 1
    }
  }
}