Update README.md

README.md

@@ -20,6 +20,10 @@ To rebase an existing atomic Fedora installation to the latest build:
  ```
  systemctl reboot
  ```
+- Update the system
+ ```
+ ujust update
+ ``` 
 
 The `latest` tag will automatically point to the latest build. That build will still always use the Fedora version specified in `recipe.yml`, so you won't get accidentally updated to the next major version.