[6.0] Version in Language string (#45828)

Author: brianteeman

language/en-GB/files_joomla.sys.ini

@@ -4,4 +4,4 @@
 ; Note : All ini files need to be saved as UTF-8
 
 FILES_JOOMLA="Joomla CMS"
-FILES_JOOMLA_XML_DESCRIPTION="Joomla! 5 Content Management System."
+FILES_JOOMLA_XML_DESCRIPTION="Joomla! 6 Content Management System."