Update App Instance

curl --request PUT \
  --url https://public.api.serval.com/v2/app-instances/{id} \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "externalServiceInstanceId": "<string>",
  "name": "<string>",
  "defaultAccessPolicyId": "<string>",
  "accessRequestsEnabled": true
}
'

{
  "data": {
    "customServiceId": "<string>",
    "service": "<string>",
    "id": "<string>",
    "teamId": "<string>",
    "externalServiceInstanceId": "<string>",
    "name": "<string>",
    "accessRequestsEnabled": true,
    "defaultAccessPolicyId": "<string>"
  }
}