Fix accidental bug that prevented custom textboxes from being passed to chatinterface (#7783)
* Add code
* add changeset
* Update gradio/chat_interface.py
Co-authored-by: Abubakar Abid <abubakar@huggingface.co>
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Co-authored-by: gradio-pr-bot <gradio-pr-bot@users.noreply.github.com>
Co-authored-by: Abubakar Abid <abubakar@huggingface.co>