Run the assistant flow locally(Step 3) in Readme fail

[LianwMS]

(.venv) PS D:\aigallery\assistant-data-openai-python-promptflow> pf flow test --flow ./src/copilot_sdk_flow/flow.flex.yaml --inputs question="which month has peak sales in 2023"
Starting prompt flow service...
Start prompt flow service on port 23333, version: 1.10.0.
You can stop the prompt flow service with the following command:'pf service stop'.
Alternatively, if no requests are made within 1 hours, it will automatically stop.
D:\aigallery\assistant-data-openai-python-promptflow.env
You can view the trace detail from the following URL:
http://localhost:23333/v1.0/ui/traces/?#collection=copilot_sdk_flow&uiTraceId=0x8111143c9abe27d18a90aab65f7a134b
pf.flow.test failed with UserErrorException: Exception: Execution failure in 'flow_entry_copilot_assistants': (TypeError) flow_entry_copilot_assistants() missing 1 required positional argument: 'chat_input'

[jfomhover]

@LianwMS that might have been because of an old version of the README. I recently pushed a new version where --inputs chat_input="" is used instead, to align with the latest flow design.

https://github.com/Azure-Samples/assistant-data-openai-python-promptflow/pull/11/files#diff-e1d5879ce3e222eb0cdd43051fb8c34c00796467acb091d0b3fa939ee3355cb5R123

[jfomhover]

This now works e2e