Rename `chat_with_functions` to use snake_case (#11020)

This PR renames the `chat-with-functions.rs` example to use snake_case
for the filename, as is convention.

Release Notes:

- N/A
f8beda0704Marshall Bowers committed on 4/26/2024, 1:43:02 AM· committed by GitHubparent40fe527
2 files changedLine totals unavailable