Update the "python_file_names" function to use pathlib globing

HELP WANTED 👋 : If you'd like to take this challenge on, please let me know! Even if you're new to Python and/or Github, this is a great place to start and I'd be happy to help walk you through this challenge as much as you need - don't hesitate to ask.

This particular issue will give you some exposure to update a function to use the [Pathlib](https://docs.python.org/3/library/pathlib.html) library.

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We should update the `python_data.python_file_names` function to use the [Path.glob](https://docs.python.org/3/library/pathlib.html#pathlib.Path.glob) function.