Merge pull request kubernetes#89119 from johngmyers/patch-1

Add missing article in prominent release note

Author: k8s-ci-robot

CHANGELOG/CHANGELOG-1.18.md

@@ -89,7 +89,7 @@ filename | sha512 hash
 
 ### (No, really, you MUST read this before you upgrade)
 
-- `kubectl` no longer defaults to `http://localhost:8080`.  If you own one of these legacy clusters, you are *strongly- encouraged to secure your server.   If you cannot secure your server, you can set `KUBERNETES_MASTER` if you were relying on that behavior and you're client-go user. Set `--server`, `--kubeconfig` or `KUBECONFIG` to make it work in `kubectl`. ([#86173](https://github.com/kubernetes/kubernetes/pull/86173), [@soltysh](https://github.com/soltysh)) [SIG API Machinery, CLI and Testing]
+- `kubectl` no longer defaults to `http://localhost:8080`.  If you own one of these legacy clusters, you are *strongly- encouraged to secure your server.   If you cannot secure your server, you can set `KUBERNETES_MASTER` if you were relying on that behavior and you're a client-go user. Set `--server`, `--kubeconfig` or `KUBECONFIG` to make it work in `kubectl`. ([#86173](https://github.com/kubernetes/kubernetes/pull/86173), [@soltysh](https://github.com/soltysh)) [SIG API Machinery, CLI and Testing]
 
 ## Changes by Kind