state_date requirement inconsistency

[corlinp]

The API reference states that start_date is required for the get portfolio orders endpoint:
https://docs.cloud.coinbase.com/prime/reference/primerestapi_getorders

However, this example of the request does not include the start_date param:
https://github.com/coinbase-samples/prime-scripts-py/blob/main/REST/prime_get_orders.py

[jc-cb]

start_date is not required for this endpoint