update list of properties on component and component version in UI model

docs/modules/ROOT/pages/templates.adoc

@@ -51,6 +51,8 @@ Only set if site.url is defined.
 | site.components
 | A map of all the components in the site, keyed by component name.
 Properties of each component include name, title, url, latest, and versions.
+Properties of each version include name (since 2.3), version, displayVersion, prerelease (if set), title, url, asciidoc (since 2.3), and navigation.
+The navigation property on each version provides access to the navigation menu for that component version.
 
 | site.ui
 | Information about the site UI.
@@ -91,7 +93,7 @@ Properties include name, title, url, latest, and versions.
 
 | page.componentVersion
 | Information about the component version for the current page.
-Properties include version, displayVersion, prerelease (if set), title, and url.
+Properties include name (since 2.3), version, displayVersion, prerelease (if set), title, url, and asciidoc (since 2.3).
 
 | page.module
 | The name of the module for the current page.