update README.adoc with correct ui bundle snippet

diff --git a/README.adoc b/README.adoc
index 786cc1e..ee2fe0b 100644 (file)
--- a/README.adoc
+++ b/README.adoc
@@ -30,7 +30,9 @@ If you want to use the default UI for your Antora-generated site, add the follow
 [source,yaml,subs=attributes+]
 ----
 ui:
-  bundle: https://gitlab.com/antora/antora-ui-default/-/jobs/artifacts/master/raw/build/ui-bundle.zip?job=bundle-stable
+  bundle:
+    url: https://gitlab.com/antora/antora-ui-default/-/jobs/artifacts/master/raw/build/ui-bundle.zip?job=bundle-stable
+    snapshot: true
 ----
 
 Read on to learn how to use your own build of the default UI.