Update amqp subscription

curl --request PATCH \
  --url https://api.gcore.com/cloud/v1/user_actions/amqp_subscriptions/{subscription_id} \
  --header 'Authorization: <api-key>' \
  --header 'Content-Type: application/json' \
  --data '{
  "connection_string": "amqps://guest:guest@192.168.123.20:5671/user_action_events",
  "exchange": "<string>",
  "receive_child_client_events": false,
  "routing_key": "foo"
}'

{
  "connection_string": "amqps://guest:guest@192.168.123.20:5671/user_action_events",
  "exchange": null,
  "id": 33,
  "receive_child_client_events": false,
  "routing_key": "foo"
}