Update README.md

Author: Snailclimb

README.md

@@ -190,7 +190,7 @@
 - [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)
-- [Kafka入门看这一篇就够了.md](docs/system-design/data-communication/Kafka入门看这一篇就够了.md)
+- [Kafka入门看这一篇就够了](docs/system-design/data-communication/Kafka入门看这一篇就够了.md)
 - [Kafka系统设计开篇-面试看这篇就够了](docs/system-design/data-communication/Kafka系统设计开篇-面试看这篇就够了.md)
 
 ### 网站架构