Added disclaimer alert box example

doc/development/documentation/styleguide/index.md

@@ -1691,6 +1691,16 @@ The development, release, and timing of any products, features, or functionality
 sole discretion of GitLab Inc.
 ```
 
+It renders on the GitLab documentation site as:
+
+DISCLAIMER:
+This page contains information related to upcoming products, features, and functionality.
+It is important to note that the information presented is for informational purposes only.
+Please do not rely on this information for purchasing or planning purposes.
+As with all projects, the items mentioned on this page are subject to change or delay.
+The development, release, and timing of any products, features, or functionality remain at the
+sole discretion of GitLab Inc.
+
 If all of the content on the page is not available, use the disclaimer once at the top of the page.
 
 If the content in a topic is not ready, use the disclaimer in the topic.