Add deprecation note for kURL

Author: divolgin

docs/vendor/kurl-about.mdx

@@ -3,6 +3,10 @@ import Installers from "../partials/kurl/_installers.mdx"
 
 # Introduction to kURL
 
+:::note
+kURL is no longer available to new customers. Replicated Embedded Cluster is the next generation product that has superceded kURL. For more information, see [Using Embedded Cluster](/vendor/embedded-overview).
+:::
+
 This topic provides an introduction to the Replicated kURL installer, including information about kURL specifications and installations.
 
 :::note