chore: update go version to 1.21

Chenxulin97 · Chenxulin97 · commit bca395c8c383 · 2024-12-25T23:37:44.000+08:00
diff --git a/README.md b/README.md
@@ -9,7 +9,7 @@
 
 ## 📋 Requirements
 
-- Go 1.20+
+- Go 1.21+
 
 ## 🚀 Install
 
diff --git a/go.mod b/go.mod
@@ -1,6 +1,6 @@
 module github.com/protocol-laboratory/zookeeper-client-go
 
-go 1.20
+go 1.21
 
 require (
 	github.com/libgox/addr v0.2.0
