Update the docs for the section of AVL tree and style (#351)

Co-authored-by: Yudong Jin <krahets@163.com>

codes/javascript/chapter_heap/my_heap.js

@@ -131,6 +131,7 @@ function testPoll(maxHeap) {
     maxHeap.print();
 }
 
+/* Driver Code */
 /* 初始化大顶堆 */
 const maxHeap = new MaxHeap([9, 8, 6, 6, 7, 5, 2, 1, 4, 3, 6, 2]);
 console.log("\n输入列表并建堆后");

codes/typescript/chapter_heap/my_heap.ts

@@ -1,5 +1,5 @@
 /**
- * File: my_heap.js
+ * File: my_heap.ts
  * Created Time: 2023-02-07
  * Author: Justin (xiefahit@gmail.com)
  */