[bug][go] step-by-step-directions-from-a-binary-tree-node-to-another

[labuladong]

此 issue 的目的是修复 chatGPT 转译的多语言代码，更详细的背景信息和修复流程见：https://github.com/labuladong/fucking-algorithm/issues/1113

请在提交 bug 之前先搜索

• [X] 我已经搜索过 issues，没有发现相同的 bug。

出错的题目链接

https://leetcode.cn/problems/step-by-step-directions-from-a-binary-tree-node-to-another/

报错信息

Line 16: Char 16: root.val undefined (type *leetcode.TreeNode has no field or method val, but does have Val) (solution.go)
Debug: 

你是否愿意提交 PR 修复这个 bug？

• [ ] 我愿意！