docs: fix Hello World example - correct workflow format (#8)

suites-help/示例代码/Hello-World.md

@@ -26,13 +26,7 @@ steps:
     name: 输出信息
     script: run
     params:
-      message: message
-
-resolved_params:
-  - step_index: 0
-    step_name: 输出信息
-    params:
-      message: "Hello, AgentGIS!"
+      message: $params.message
 ```
 
 ### scripts/run.py
@@ -58,10 +52,10 @@ print(json.dumps(result))
 
 ```bash
 # 打包
-tar czf scripts.tar.gz workflow.yaml scripts/
+tar czf hello-world.tgz workflow.yaml scripts/
 
-# 发布后执行
-agc run /tmp/output --suite-id <suite-id> --input key=val
+# 通过 API 发布后执行
+agc run /tmp/output --suite-id <suite-id> --input message="Hello, AgentGIS!"
 ```
 
 完整代码参考：`SuiteHub/hello-world-suite`