update API docs

README.md

@@ -9,16 +9,10 @@
 - Detail Book [rCore-Tutorial-Book-v3](https://rcore-os.github.io/rCore-Tutorial-Book-v3/)
 
 
-### OS API docs of rCore Tutorial Code 2024A
-- [OS API docs of ch1](https://learningos.github.io/rCore-Camp-Code-2024A/ch1/os/index.html)
-  AND [OS API docs of ch2](https://learningos.github.io/rCore-Camp-Code-2024A/ch2/os/index.html)
-- [OS API docs of ch3](https://learningos.github.io/rCore-Camp-Code-2024A/ch3/os/index.html)
-  AND [OS API docs of ch4](https://learningos.github.io/rCore-Camp-Code-2024A/ch4/os/index.html)
-- [OS API docs of ch5](https://learningos.github.io/rCore-Camp-Code-2024A/ch5/os/index.html)
-  AND [OS API docs of ch6](https://learningos.github.io/rCore-Camp-Code-2024A/ch6/os/index.html)
-- [OS API docs of ch7](https://learningos.github.io/rCore-Camp-Code-2024A/ch7/os/index.html)
-  AND [OS API docs of ch8](https://learningos.github.io/rCore-Camp-Code-2024A/ch8/os/index.html)
-- [OS API docs of ch9](https://learningos.github.io/rCore-Camp-Code-2024A/ch9/os/index.html)
+### OS API docs
+- [ch1](https://learningos.github.io/rCore-Camp-Code-2024A/ch1/os/index.html) [ch2](https://learningos.github.io/rCore-Camp-Code-2024A/ch2/os/index.html) [ch3](https://learningos.github.io/rCore-Camp-Code-2024A/ch3/os/index.html) [ch4](https://learningos.github.io/rCore-Camp-Code-2024A/ch4/os/index.html)
+- [ch5](https://learningos.github.io/rCore-Camp-Code-2024A/ch5/os/index.html) [ch6](https://learningos.github.io/rCore-Camp-Code-2024A/ch6/os/index.html) [ch7](https://learningos.github.io/rCore-Camp-Code-2024A/ch7/os/index.html) [ch8](https://learningos.github.io/rCore-Camp-Code-2024A/ch8/os/index.html)
+
 
 ### Related Resources
 - [Learning Resource](https://github.com/LearningOS/rust-based-os-comp2022/blob/main/relatedinfo.md)