fix(k8s): update warning

Author: bene2k1

pages/kubernetes/quickstart.mdx

@@ -133,9 +133,10 @@ This section outlines the settings for your cluster pools. You can configure as
     * The configuration for your **pool options**, including the number of nodes and whether to enable autoscale. You can also choose whether to enable autoheal and whether to link the cluster to a placement group. Alternatively, you can leave these options at default values.
 7. Click **Create cluster**. Your cluster is deployed, and you are taken to the cluster’s **Overview** tab.
   <Message type="important">
-    Make sure you have:
-    * An `arm64` or `amd64` server running on Ubuntu 24.04 or Debian, having a public IP assigned to it.
-    * A Scaleway [secret key](/iam/how-to/create-api-keys/).
+    The Kosmos agent/installer supports Ubuntu 24.04 and may work on Debian based distributions.     
+    It is available for `arm64` or `amd64` server architectures
+
+    Bear in mind that we **do not provide support on external nodes**.
   </Message>
   <Message type="tip">
     For more information about adding external nodes to your Kosmos cluster, refer to our dedicated [How to manage a Kosmos cluster](/kubernetes/how-to/edit-kosmos-cluster/) documentation.