update README.md

task-executor-kit/README.md

@@ -12,8 +12,9 @@
    
 2. 获取任务执行实例
 
-    ```java 
-        TaskExecutor<User, User, String> executor = TaskPoolFactory.createExecutor();
+    ```java
+        TaskPoolFactory taskPoolFactory = new TaskPoolFactory();
+        TaskExecutor<User, User, String> executor = taskPoolFactory.createExecutor();
     ```
    
 3. 初始化执行器