update book toc

book/contents/SUMMARY.md

@@ -79,23 +79,23 @@
         - [线程同步：锁、Condvar和信号量](advance/concurrency-with-threads/sync1.md)
         - [线程同步：Atomic原子操作与内存顺序](advance/concurrency-with-threads/sync2.md)
         - [基于Send和Sync的线程安全](advance/concurrency-with-threads/send-sync.md)
-    - [async/await异步编程 doing](advance/async/intro.md)
-        - [async/await语法 todo](advance/async/async-await.md)
-        - [future详解 todo](advance/async/future/into.md)
-            - [何为Future](advance/async/future/future.md)
-            - [任务调度](advance/async/future/task-schedule.md)
-            - [任务执行器](advance/async/future/task-excutor.md)
-            - [系统IO](advance/async/future/system-io.md)
-            - [执行多个Future](advance/async/future/multi-futures.md)
-        - [Pin、Unpin todo](advance/async/pin-unpin.md)
-        - [遇到不支持的异步特性? todo](advance/async/future/workarounds.md)
-        - [HTTP Client/Server todo](advance/async/http.md)
-        - [定海神针-tokio包 todo](advance/async/tokio/intro.md)
-            - [基本用法](advance/async/tokio/basic.md)
-            - [异步消息流](advance/async/tokio/stream.md))
     - [全局变量 todo](advance/global-variable.md)
     - [高阶特征约束(HRTB) todo](advance/hrtb.md)
 ## 专题内容,每个专题都配套一个小型项目进行实践
+- [async/await异步编程 doing](async/intro.md)
+    - [async/await语法 todo](async/async-await.md)
+    - [future详解 todo](async/future/into.md)
+        - [何为Future](async/future/future.md)
+        - [任务调度](async/future/task-schedule.md)
+        - [任务执行器](async/future/task-excutor.md)
+        - [系统IO](async/future/system-io.md)
+        - [执行多个Future](async/future/multi-futures.md)
+    - [Pin、Unpin todo](async/pin-unpin.md)
+    - [遇到不支持的异步特性? todo](async/future/workarounds.md)
+    - [HTTP Client/Server todo](async/http.md)
+    - [定海神针-tokio todo](async/tokio/intro.md)
+        - [基本用法](async/tokio/basic.md)
+        - [异步消息流](async/tokio/stream.md))
 - [Rust最佳实践 doing](practice/intro.md)
     - [日常开发三方库精选](practice/third-party-libs.md)
     - [一些写代码的技巧 todo](practice/coding-tips.md)