Update user phone number

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

{
  "data": {
    "id": "0b4d3a4f-c6d3-4f3a-9aed-295614716641",
    "type": "user_phone_numbers",
    "attributes": {
      "user_id": 617,
      "phone": "+14155553000",
      "primary": true,
      "created_at": "2026-01-03T21:30:22.411-08:00",
      "updated_at": "2026-01-03T21:30:22.514-08:00"
    }
  }
}