docs(update):更新Arabica Sprint3 相关文档

Signed-off-by: gzkoala <guohao@gitconomy.org>

projects/arabica/docs/design/arabica-sprint3-development-specification.md

@@ -214,9 +214,9 @@ async function handleFetchFramework(params: any) {
 
 ```mermaid
 graph TD
-    A[""接收参数 params.content"] --> B{"typeof content === string?"}
+    A["接收参"] --> B{"typeof content === string?"}
     B -- 是 --> C["直接将 content 传给 resourceService"]
-    B -- 否("是个对象") --> D["执行 JSON.stringify"]
+    B -- 否("是个对象") --> D["执行"]
     D --> C
     C --> E["写入 Markdown 文件"]
     E --> F["返回操作成功"]