Update usage-dashboard/README.md

remove sudo on systemctl user

usage-dashboard/README.md

@@ -138,10 +138,10 @@ WantedBy=default.target
 Kích hoạt service:
 
 ```bash
-sudo systemctl --user daemon-reload
-sudo systemctl --user enable cliproxy-dashboard
-sudo systemctl --user start cliproxy-dashboard
-sudo systemctl --user status cliproxy-dashboard
+systemctl --user daemon-reload
+systemctl --user enable cliproxy-dashboard
+systemctl --user start cliproxy-dashboard
+systemctl --user status cliproxy-dashboard
 ```
 
 ## 📖 Hướng dẫn sử dụng Dashboard