Document for the batching arguments when creating producer

See https://pulsar.apache.org/api/python/3.3.x/pulsar.Client.html#create_producer

<img width="706" alt="image" src="https://github.com/apache/pulsar-client-python/assets/18204803/9fec0187-4848-4d6c-9cbc-46344bf1ba9f">
