udpate os-lecs

Author: chyyuu

os-lecs.md

@@ -23,7 +23,7 @@ backgroundColor: white
 
 ## 2024 春季
 
-[幻灯片列表](https://www.yuque.com/xyong-9fuoz/qczol5/glemuu?) -- [简介](./course-intro.html) -- [课前准备](./lecs-preview.html) -- [实验](./labs-intro.html)
+[幻灯片列表](https://www.yuque.com/xyong-9fuoz/qczol5/glemuu?) -- [简介](./course-intro.html) -- [课前准备](./lecs-preview.html) -- -- [思维导图](https://chyyuu.github.io/test2/oscourse.html) -- [实验](./labs-intro.html) 
 
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