Update extension and ui versions

antora-playbook.yml

@@ -7,6 +7,7 @@ antora:
   - '@antora/atlas-extension'
   - require: '@springio/antora-extensions/root-component-extension'
     root_component_name: 'shell'
+  - require: '@springio/antora-extensions/asciinema-extension'
 site:
   title: Spring Shell
   url: https://docs.spring.io/spring-shell/reference
@@ -36,7 +37,8 @@ urls:
   redirect_facility: httpd
 ui:
   bundle:
-    url: https://github.com/spring-io/antora-ui-spring/releases/download/v0.3.6/ui-bundle.zip
+    url: https://github.com/spring-io/antora-ui-spring/releases/download/latest/ui-bundle.zip
+    snapshot: true
 runtime:
   log:
     failure_level: warn

build.gradle

@@ -15,7 +15,7 @@ antora {
 		'@antora/atlas-extension': '1.0.0-alpha.1',
 		'@antora/collector-extension': '1.0.0-alpha.3',
 		'@asciidoctor/tabs': '1.0.0-beta.3',
-		'@springio/antora-extensions': '1.4.2',
+		'@springio/antora-extensions': '1.8.0',
 		'@springio/asciidoctor-extensions': '1.0.0-alpha.8',
 	]
 }