update README.md

Change-Id: I7a10b6913bb2aac29124e6370ffa41e0fd2b50eb

Author: chickenlj

README.md

@@ -27,7 +27,7 @@ This is the Java implementation of [AgentScope Runtime](https://github.com/agent
 - **Sandboxed Tool Execution**: Isolated sandboxes ensure safe tool execution without system compromise
 - **Developer Friendly**: Simple deployment with powerful customization options
 - **Framework Agnostic**: Not tied to any specific framework. Works seamlessly with popular open-source agent frameworks and custom implementations
-- 🚧 **Observability**: Trace and visualize agent operations comprehensively
+- 🚧 **Observability**: Trace and visualize agent operations comprehensively (under development)
 
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README_zh.md

@@ -27,7 +27,7 @@
 - **沙箱化工具执行**：隔离的沙箱确保工具执行安全，不会危及系统
 - **开发者友好**：简单部署，强大的自定义选项
 - **框架无关**：不绑定任何特定框架。可与流行的开源 Agent 框架和自定义实现无缝协作
-- 🚧 **可观测性**：全面追踪和可视化 Agent 操作
+- 🚧 **可观测性**：全面追踪和可视化 Agent 操作（开发中）
 
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