Updates landing page and conf.yaml to specify Elastic Stack 8.19 and earlier

Author: KOTungseth

conf.yaml

@@ -76,6 +76,11 @@ repos:
 
 contents_title:     Elastic Docs
 
+asciidoc:
+  attributes:
+    page-title: Elastic documentation for Elastic Stack 8.19 and earlier
+    page-description: View the guides, tutorials, and API reference documentation for the Elastic Stack 8.19 and earlier.
+
 # Each item should take the form:
 #   <key>: &<variable> <value>
 # The keys don't really matter, but by convention the are the same as the variable.

extra/docs_landing.html

@@ -445,12 +445,18 @@
   }
 </style>
 
-<div class="old-elastic-experience-warning">
-  You are viewing the previous version of Elastic docs. To view the current docs, go to <a href="https://www.elastic.co/docs">elastic.co/docs</a>.
-</div>
-
 <div class="legalnotice"></div>
 
+<div class="row my-4">
+  <div class="col">
+    <p>
+      Welcome to the docs that cover all changes in Elastic Stack 8.19 and earlier.
+      To view the docs for the latest Elastic product versions, including Elastic Stack 9.1.0 and Elastic Cloud Serverless,
+      go to <a href="https://www.elastic.co/docs">elastic.co/docs</a>.
+    </p>
+  </div>
+</div>
+
 <div id="subnavigation" class="subnavigation">
   <p>
     <a class="inline-block mr-3" href="https://www.elastic.co/guide/index.html#viewall">Browse all docs</a>