fix: update index and README

Author: yanglbme

README.md

@@ -2,17 +2,17 @@
 
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+[![wechat-group](https://badgen.net/badge/chat/%E5%BE%AE%E4%BF%A1%E4%BA%A4%E6%B5%81/cyan)](#公众号)
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+
 
 本项目大部分内容来自中华石杉，版权归作者所有，内容涵盖[高并发](#高并发架构)、[分布式](#分布式系统)、[高可用](#高可用架构)、[微服务](#微服务架构)、[海量数据处理](#海量数据处理)等领域知识。[我](https://github.com/yanglbme)对这部分知识做了一个系统的整理，方便学习查阅。
 
@@ -88,7 +88,7 @@
 * [分布式服务接口的幂等性如何设计（比如不能重复扣款）？](./docs/distributed-system/distributed-system-idempotency.md)
 * [分布式服务接口请求的顺序性如何保证？](./docs/distributed-system/distributed-system-request-sequence.md)
 * [如何自己设计一个类似 Dubbo 的 RPC 框架？](./docs/distributed-system/dubbo-rpc-design.md)
-* [CAP定理的P是什么](./docs/distributed-system/distributed-system-cap.md)
+* [CAP 定理的 P 是什么？](./docs/distributed-system/distributed-system-cap.md)
 
 ### 分布式锁
 

summary.md

@@ -54,6 +54,7 @@
         - [分布式服务接口的幂等性如何设计？](./docs/distributed-system/distributed-system-idempotency.md)
         - [分布式服务接口请求的顺序性如何保证？](./docs/distributed-system/distributed-system-request-sequence.md)
         - [如何自己设计一个类似 Dubbo 的 RPC 框架？](./docs/distributed-system/dubbo-rpc-design.md)
+        - [CAP 定理的 P 是什么？](./docs/distributed-system/distributed-system-cap.md)
 
     - 分布式锁
         - [Zookeeper 都有哪些应用场景？](./docs/distributed-system/zookeeper-application-scenarios.md)