fix: php示例代码错误修复

_posts/2024-11-12-Notes-on-the-Theory-of-Network-Offensive-and-Defensive-Technologies.md

@@ -951,7 +951,7 @@ HTTP指纹识别是为了判断服务器的版本，从而找到服务器的漏
 	include($filename);
 ?>
 <?php
-	echo “hello, world”;
+	echo "hello, world";
 ?>
 <?php
 	phpinfo();