[DOCS] Fixes link to Stack Overview

Author: lcawl

docs/reference/setup/install/license.asciidoc

@@ -1,6 +1,6 @@
 This package is free to use under the Elastic license. It contains open source 
 and free commercial features and access to paid commercial features.  
-{xpack-ref}/license-management.html[Start a 30-day trial] to try out all of the 
+{stack-ov}/license-management.html[Start a 30-day trial] to try out all of the 
 paid commercial features. See the 
 https://www.elastic.co/subscriptions[Subscriptions] page for information about 
 Elastic license levels.