Update Sample Task Instruction

Examples/Readme.md

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+### 说明
+
+将此文件夹里的`.json`文件重命名为大于0的纯数字，然后放入自己电脑EasySpider文件夹里的`tasks`文件夹内即可加载对应任务。
+
+如果是MacOS系统，需要放入`/Users/用户名/Library/Application Support/EasySpider/tasks`文件夹内。
+
+### Instruction
+
+Rename the `.json` file in this folder to a pure number greater than 0, and then put it into the `tasks` folder in your computer's EasySpider folder to load the corresponding task.
+
+If it is a MacOS system, you need to put it in the `/Users/username/Library/Application Support/EasySpider/tasks` folder.