update

Author: coderbruis

README.md

@@ -154,6 +154,7 @@ Netty实战课相关点位于：Spring-Netty，com/bruis/learnnetty/im包下，
 
 
 -   kafka源码分析
+    - kafka版本：4.2
     - [kafka broker核心源码分析](https://github.com/coderbruis/JavaSourceCodeLearning/blob/master/note/kafka/kafka%20broker%E6%A0%B8%E5%BF%83%E6%BA%90%E7%A0%81%E5%88%86%E6%9E%90.md)
     - [kafka消费者核心源码分析（一）](https://github.com/coderbruis/JavaSourceCodeLearning/blob/master/note/kafka/kafka%E6%B6%88%E8%B4%B9%E8%80%85%E6%A0%B8%E5%BF%83%E6%BA%90%E7%A0%81%E5%88%86%E6%9E%90%EF%BC%88%E4%B8%80%EF%BC%89.md)