Write a function that reverses a string. The input string is given as an array of characters s.
You must do this by modifying the input array in-place with O(1) extra memory.
1 <= s.length <= 10^5s[i] is a printable ASCII characters = ["h","e","l","l","o"]["o","l","l","e","h"]s = ["H","a","n","n","a","h"]["h","a","n","n","a","H"]