commit files

README.md

@@ -38,7 +38,7 @@ Run yeeshell.
 
 ​	(1) `cd /your/path`
 
-<img src="http://gitea.shuishan.net.cn/10195501441/OS2021_Project1.Shell/src/commit/db0d8aefd25a6cac526eaa7ded9f058ec87b15f7/lab_report/test_case_img/cd.png" alt="cd" style="zoom: 76%;" />
+<img src="http://gitea.shuishan.net.cn/10195501441/OS2021_Project1.Shell/src/branch/master/lab_report/test_case_img/cd.png" alt="cd" style="zoom: 76%;" />
 
 ​	(2) `ls -a -l`