Update autoupdate.rst

Hi, you have the wrong registry path in the documentation? (tested client version: 2.6.0 x64 build: 20190927)
The Nextcloud Client checks the path "HKEY_LOCAL_MACHINE\Software\Policies\Nextcloud GmbH\Nextcloud" not "HKEY_LOCAL_MACHINE\Software\Policies\Nextcloud\Nextcloud" under HKLM.

doc/autoupdate.rst

@@ -87,7 +87,7 @@ To prevent automatic updates and disallow manual overrides:
 
 1. Edit this Registry key:
 
-    ``HKEY_LOCAL_MACHINE\Software\Policies\Nextcloud\Nextcloud``
+    ``HKEY_LOCAL_MACHINE\Software\Policies\Nextcloud GmbH\Nextcloud``
 
 2. Add the key ``skipUpdateCheck`` (of type DWORD).