Merge pull request Snailclimb#330 from sage417/patch-3

Update README.md

Author: Snailclimb

README.md

@@ -179,7 +179,7 @@
 ### 数据通信
 
 - [数据通信(RESTful、RPC、消息队列)相关知识点总结](docs/system-design/data-communication/summary.md)
-- [Dubbo 总结：关于 Dubbo 的重要知识点](docs/system-design/data-communication/Dubbo.md)
+- [Dubbo 总结：关于 Dubbo 的重要知识点](docs/system-design/data-communication/dubbo.md)
 - [消息队列总结](docs/system-design/data-communication/message-queue.md)
 - [RabbitMQ 入门](docs/system-design/data-communication/RabbitMQ.md)
 - [RocketMQ的几个简单问题与答案](docs/system-design/data-communication/RocketMQ-Questions.md)