solves second minimum in bst

Author: anishLearnsToCode

README.md

@@ -173,7 +173,7 @@
 | 661 | [Image Smoother](https://leetcode.com/problems/image-smoother) | [![Java](assets/java.png)](src/ImageSmoother.java) [![Python](assets/python.png)](python/image_smoother.py) |
 | 665 | [Non Deceasing Array](https://leetcode.com/problems/non-decreasing-array) | [![Java](assets/java.png)](src/NonDecreasingArray.java) [![Python](assets/python.png)](python/non_decreasing_array.py) |
 | 669 | [Trim a Binary Search Tree](https://leetcode.com/problems/trim-a-binary-search-tree) | [![Java](assets/java.png)](src/TrimABinarySearchTree.java) [![Python](assets/python.png)](python/trim_a_binary_search_tree.py) |
-| 671 | [Second Minimum Node in Binary Tree](https://leetcode.com/problems/second-minimum-node-in-a-binary-tree) | [![Java](assets/java.png)](src/SecondMinimumNodeInBinaryTree.java) [![Python](assets/python.png)](python/)second_minimum_node_in_binary_tree.py |
+| 671 | [Second Minimum Node in Binary Tree](https://leetcode.com/problems/second-minimum-node-in-a-binary-tree) | [![Java](assets/java.png)](src/SecondMinimumNodeInBinaryTree.java) [![Python](assets/python.png)](python/second_minimum_node_in_binary_tree.py) |
 | 674 | [Longest Continuous Increasing Subsequence](https://leetcode.com/problems/longest-continuous-increasing-subsequence) | |
 | 680 | [Valid Palindrome II](https://leetcode.com/problems/valid-palindrome-ii) | |
 | 682 | [Baseball Game](https://leetcode.com/problems/baseball-game) | |