Fix note template label

doc/visualtour.rst

@@ -80,7 +80,7 @@ Adding a Folder
 Adding a new sync is initiated by clicking ``Add Folder...`` in the ``Account``
 settings.
 
-..note: To add a folder, you must not already sync a folder that contains this
+..note:: To add a folder, you must not already sync a folder that contains this
         folder. By default, the wizard sets up the root folder of the ownCloud
         server to sync all of your ownCloud account. In consequence, you will
         first need to remove this folder prior to specifying new syncs.