Add: place v1.5.6 into readme
diff --git a/README.md b/README.md
index 7460d8e..33fcdc2 100644
--- a/README.md
+++ b/README.md
@@ -17,6 +17,8 @@
 
 ## Release note ##
 
+[v1.5.6 - Apr 8, 2021](https://github.com/apache/dubbo-go/releases/tag/v1.5.6)
+
 [v1.5.5 - Jan 5, 2021](https://github.com/apache/dubbo-go/releases/tag/v1.5.5)
 
 [v1.4.5 - Nov 18, 2020](https://github.com/apache/dubbo-go/releases/tag/v1.4.5)
diff --git a/README_CN.md b/README_CN.md
index 060b5de..b8a2f02 100644
--- a/README_CN.md
+++ b/README_CN.md
@@ -16,6 +16,8 @@
 
 ## 发布日志 ##
 
+[v1.5.6 - 2021年4月8日](https://github.com/apache/dubbo-go/releases/tag/v1.5.6)
+
 [v1.5.5 - 2021年1月5日](https://github.com/apache/dubbo-go/releases/tag/v1.5.5)
 
 [v1.4.5 - 2020年11月18日](https://github.com/apache/dubbo-go/releases/tag/v1.4.5)