test(binary_search_tree): update test param all the language

use param value 7, not 5. function test param value with param value in example picture as same.

codes/typescript/chapter_tree/binary_search_tree.ts

@@ -150,7 +150,7 @@ console.log('\n初始化的二叉树为\n');
 printTree(getRoot());
 
 /* 查找结点 */
-let node = search(5);
+let node = search(7);
 console.log('\n查找到的结点对象为 ' + node + '，结点值 = ' + node!.val);
 
 /* 插入结点 */