Merge pull request silverstripe#9313 from DorsetDigital/patch-5

Doc:  Remove reference to themes

Author: robbieaverill

docs/en/02_Developer_Guides/04_Configuration/01_SiteConfig.md

@@ -3,8 +3,8 @@ summary: Content author configuration through the SiteConfig module.
 
 # SiteConfig
 
-The `SiteConfig` module provides a generic interface for managing site wide settings or functionality which is used 
-throughout the site. Out of the box this includes selecting the current site theme, site name and site wide access.
+The `SiteConfig` module provides a generic interface for managing site-wide settings or functionality which is used 
+throughout the site. Out of the box, this includes setting the site name and site-wide access.
 
 ## Accessing variables