Update README.md

Author: Welsonpeaches

README.md

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 # cw-student-on-duty-plugin
 
+
+
 # 简介
 Class-Widgets 值日生插件，用于展示当天值日生信息
 
+![image](https://github.com/user-attachments/assets/825b66c3-2743-4fb2-8d67-d7aece71d0c2)
+
+
+#如何使用
+1.在Plugin Plaza下载本插件
+2.在下载好的插件目录（一般为**your_cw_path/Class-Widgets/plugins/Students_On_Duty**）下准备好![duty.json](https://github.com/Welsonpeaches/cw-student-on-duty-plugin/blob/main/duty.json)
+3.在cw的设置页→插件→启用本插件
+![image](https://github.com/user-attachments/assets/769cb021-7bd9-4b2c-9198-fc7353ffa3c4)