Create 344-Reverse-String.py and Create 680-Valid-Palindrome-II.py

[NN-Liu]

File(s) Modified: 344-Reverse-String.py
Language(s) Used: Python
Submission URL: https://leetcode.com/submissions/detail/844613172/

[NN-Liu]

File(s) Modified: 680-Valid-Palindrome-II.py
Language(s) Used: Python
Submission URL: https://leetcode.com/submissions/detail/844355256/

[aadil42]

Bro, you need to provide the file name, the language used, and the link to your submission. check your very first comment.

There it says:
File(s) Modified: 1-Two-Sum.py, 2-Add-Two-Numbers.py, etc...
Language(s) Used: python, javascript, etc...
Submission URL: https://leetcode.com/submissions/detail/xxxxxxxxx/

just add the file name, used language, and submission link in these three lines.
check out this PR for reference #1459

[Ahmad-A0]

Thanks, @NN-Liu and @aadil42!