Add message on k0s compatibility (#819)

* Add message on k0s compatibility

* k0S -> k0s

* Update modules/ROOT/pages/kubernetes/k0s.adoc

Co-authored-by: Sebastian Bernauer <[email protected]>

---------

Co-authored-by: Sebastian Bernauer <[email protected]>

Author: soenkeliebau

modules/ROOT/nav1.adoc

@@ -4,6 +4,7 @@
 ** xref:kubernetes/eks.adoc[]
 ** xref:kubernetes/gke.adoc[]
 ** xref:kubernetes/huawei-cloud.adoc[]
+** xref:kubernetes/k0s.adoc[]
 ** xref:kubernetes/ibm-cloud.adoc[]
 ** xref:kubernetes/ionos-managed-k8s.adoc[]
 ** xref:kubernetes/ionos-managed-stackable.adoc[]

modules/ROOT/pages/kubernetes/k0s.adoc

@@ -0,0 +1,7 @@
+= k0s
+
+https://k0sproject.io/[https://k0sproject.io/{external-link-icon}^]
+
+k0s uses a non-standard Kubelet state directory.
+For this reason the secret-operator and listener-operator on k0s require special handling.
+Please refer to the xref:secret-operator:installation.adoc[secret-operator installation guide] and the xref:listener-operator:installation.adoc[listener-operator installation guide] for details.