Updated readme

README.md

@@ -78,12 +78,20 @@ return array(
 ```
 
 ## How to update
+Self-update **[BETA]**:
++ Navigate to the system page as admin.
++ Click the check for update button, and finally the upgrade button.
++ Wait until the browser redirect to the install page.
++ Click the update button.
++ Done.
+
+
+Manual update:
 + Download and extract the release zip to your document root, overwriting any file.
 + Navigate to the `/install` path (es: `http://example.com/` -> `http://example.com/install/`)
 + Click the update button.
 + Done.
 
-
 #### Docker deployment
 + [Docker container](https://hub.docker.com/r/pe46dro/xbackbone-docker)