docs: 링크 추가

Invidam · Invidam · commit d77b7bf88043 · 2024-05-15T15:46:14.000+09:00
diff --git a/maximum-depth-of-binary-tree/invidam.go.md b/maximum-depth-of-binary-tree/invidam.go.md
@@ -72,4 +72,4 @@ func maxDepth(root *TreeNode) int {
 ```
 
 # What I learned
-- **Slice**
+- [Slice](https://velog.io/@invidam/GoLang-Slice)
