Update 0242-valid-anagram.py

[VarshithaGangula3]

used sorted list

[mdmzfzl]

Thank you for making a PR! But sorted list has a time complexity of O(n log n) compared to frequency map approach which is O(n). So for larger inputs, the original solution is more efficient.

That said, your approach is more concise and readable, so you could add it as an alternative solution or a comment in the code. Feel free to update the PR accordingly. Don't forget to format the code and let me know if you have any more questions!