28. Find the Index of the First Occurrence in a String README.md

[fannydai]

Problem 28 readme is not generating

To Reproduce Steps to reproduce the behavior: Submit working code for question 28 on leetcode, submit problem https://leetcode.com/problems/find-the-index-of-the-first-occurrence-in-a-string/

class Solution { public int strStr(String haystack, String needle) { return haystack.indexOf(needle); } }