gradio

ca8753bb - Fixes: Chatbot crashes when given empty url following http:// or https:// (#7138)

Fixes: Chatbot crashes when given empty url following http:// or https:// (#7138) * link fix * add changeset * add unit test * format --------- Co-authored-by: gradio-pr-bot <gradio-pr-bot@users.noreply.github.com>