Bumps version number in the title bar

Author: Robert Fekete

config/_default/config.toml

@@ -65,7 +65,7 @@ weight = 1
   # Used in the "version-banner" partial to display a version number for the 
   # current doc set.
 
-  version = "4.8.0"
+  version = "4.9.0"
   version_menu = "Releases"
   version_menu_canonicallinks = true
   version_menu_pagelinks = true