docs: Update API Documentation link in README.md to Java version

Author: seymourtang

agora-rest-client-core/src/main/java/io/agora/rest/services/convoai/README.md

@@ -29,7 +29,7 @@ Agora's Conversational AI Engine redefines human-computer interaction, breaking
 
 ## API Definition
 
-For more api details, please refer to the [API Documentation](https://doc.shengwang.cn/api-ref/convoai/go/go-api/overview)
+For more api details, please refer to the [API Documentation](https://doc.shengwang.cn/api-ref/convoai/java/java-api/overview)
 
 ## API Call Examples