Minor edit in python-tuples: tuple is built in to Python 3.9+, no need to import

[mcmcgovern]

Bug Report for https://neetcode.io/problems/python-tuples

Please describe the bug below and include any steps to reproduce the bug or screenshots if possible.

Python versions 3.9 and below no longer require importing Tuple from typing. The standard way is now to just use tuple the same way other types are used like int, list, etc. Python 3.9 and below have reached their end of life, so I think it is good to teach people the way things should be done going forward.