fix README.md

Author: xiao2shiqi

README.md

@@ -10,7 +10,7 @@ LeetCode
 |977|[Squares of a Sorted Array](https://leetcode-cn.com/problems/squares-of-a-sorted-array/) | [Go](https://github.com/xiao2shiqi/leetcode/blob/master/go/977-solution.go) | Easy
 |876|[Middle of the Linked List](https://leetcode-cn.com/problems/middle-of-the-linked-list/) | [Java](https://github.com/xiao2shiqi/leetcode/blob/master/src/main/java/Solution876.java), [Ruby](https://github.com/xiao2shiqi/leetcode/blob/master/ruby/solution876.rb) | Easy
 |766|[Toeplitz Matrix](https://leetcode-cn.com/problems/toeplitz-matrix/) | [Java](https://github.com/xiao2shiqi/leetcode/blob/master/src/main/java/Solution766.java), [Go](https://github.com/xiao2shiqi/leetcode/blob/master/go/766-solution.go) | Easy
-|724|[Find Pivot Index](https://leetcode-cn.com/problems/find-pivot-index/) [Java](https://github.com/xiao2shiqi/leetcode/blob/master/src/main/java/Solution724.java), | [Go](https://github.com/xiao2shiqi/leetcode/blob/master/go/724-solution.go) | Easy
+|724|[Find Pivot Index](https://leetcode-cn.com/problems/find-pivot-index/) | [Java](https://github.com/xiao2shiqi/leetcode/blob/master/src/main/java/Solution724.java), [Go](https://github.com/xiao2shiqi/leetcode/blob/master/go/724-solution.go) | Easy
 |674|[Longest Continuous Increasing Subsequence](https://leetcode-cn.com/problems/longest-continuous-increasing-subsequence/) | [Java](https://github.com/xiao2shiqi/leetcode/blob/master/src/main/java/Solution674.java), [Go](https://github.com/xiao2shiqi/leetcode/blob/master/go/674-solution.go) | Easy
 |665|[Non-decreasing Array](https://leetcode-cn.com/problems/non-decreasing-array//) | [Java](https://github.com/xiao2shiqi/leetcode/blob/master/src/main/java/Solution665.java), [Go](https://github.com/xiao2shiqi/leetcode/blob/master/go/665-solution.go) | Easy
 |643|[Maximum Average Subarray I](https://leetcode-cn.com/problems/maximum-average-subarray-i/) | [Java](https://github.com/xiao2shiqi/leetcode/blob/master/src/main/java/Solution643.java), [Go](https://github.com/xiao2shiqi/leetcode/blob/master/go/643-solution.go) | Easy