update version number in conf.py

user_manual/conf.py

@@ -51,7 +51,7 @@ copyright = u'2013-2015, The ownCloud developers'
 # built documents.
 #
 # The short X.Y version.
-version = '1.6.2'
+version = '1.9.0'
 # The full version, including alpha/beta/rc tags.
 release = version