Update overview documentation link

Signed-off-by: Robert Young <robeyoun@redhat.com>

Author: robobario

overview.markdown

@@ -5,7 +5,7 @@ permalink: /overview/
 toc: true
 ---
 
-This page provides an overview of how Kroxylicious works.  For more details, please refer to the [documentation](https://kroxylicious.io/docs/v0.6.0/).
+This page provides an overview of how Kroxylicious works.  For more details, please refer to the [documentation]({{ '/documentation/' | absolute_url }}).
 
 # What is Kroxylicious?