Update autoupdate.rst

Corrected configuration file location

doc/autoupdate.rst

@@ -117,8 +117,8 @@ Preventing Automatic Updates in Linux Environments
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 Because the Linux client does not provide automatic updating functionality, there is no
-need to remove the automatic-update check.  However, if you want to disable it edit (or 
-create, if it does not already exist) ``/etc/ownCloud/ownCloud.conf``. Add these lines:
+need to remove the automatic-update check.  However, if you want to disable it edit your desktop
+client configuration file, ``$HOME/.local/share/data/ownCloud/owncloud.cfg``. Add these lines:
 
     [General]
     skipUpdateCheck=true