fix: dead link

4.人工智能/4.4FAQ：常见问题.md

@@ -53,7 +53,6 @@
 尝试阅读以下内容
 
 - [形象的机器学习简介](http://www.r2d3.us/visual-intro-to-machine-learning-part-1/)
-- [一份温柔的机器学习指南](https://blog.monkeylearn.com/a-gentle-guide-to-machine-learning/)
 - [为开发者准备的机器学习简介](http://blog.algorithmia.com/introduction-machine-learning-developers/)
 - [菜鸟的机器学习基础](https://www.analyticsvidhya.com/blog/2015/06/machine-learning-basics/)
 - [你如何向非计算机专业的人来解释机器学习与数据挖掘？](https://www.quora.com/How-do-you-explain-Machine-Learning-and-Data-Mining-to-non-Computer-Science-people)

6.计算机安全/6.2二进制安全.md

@@ -13,7 +13,7 @@ reverse 主要研究软件破解，软件加固，计算机病毒等。
 ## 入门材料
 > HGAME Mini 2022 Reverse Pwn 入门材料
 > Reverse:https://www.notion.so/b92ca2bfaacf4e7c873882dff9dbf649
-> Pwn:https://ek1ng.oss-cn-hangzhou.aliyuncs.com/HGAME%20Mini%202022%20Pwn%E5%85%A5%E9%97%A8%E6%8C%87%E5%8C%97.pdf
+> Pwn:[PWN入门指北](https://ek1ng.oss-cn-hangzhou.aliyuncs.com/HGAME%20Mini%202022%20Pwn%E5%85%A5%E9%97%A8%E6%8C%87%E5%8C%97.pdf)
 
 ## 学习二进制安全需要具备哪些基础？