docs: Add note about setting correct kubelet work dir for k0s (#362)

* Add note about setting correct kubelet work dir for k0s to documentation.

K0s has a non default kubelet work dir which needs to be configured when deploying secret operator.

* k0S -> k0s

Author: soenkeliebau

docs/modules/listener-operator/pages/installation.adoc

@@ -68,6 +68,12 @@ Microk8s uses a non-standard Kubelet state directory.
 Installing listener-operator on Microk8s requires the argument
 `--set kubeletDir=/var/snap/microk8s/common/var/lib/kubelet` to be added to the `helm install` command.
 
+=== k0s
+
+k0s uses a non-standard Kubelet state directory.
+Installing listener-operator on k0s requires the argument
+`--set kubeletDir=/var/lib/k0s/kubelet` to be added to the `helm install` command.
+
 === HUAWEI cloud
 
 In some cases HUAWEI cloud has the kubelet directory located at `/mnt/paas/kubernetes/kubelet`, resulting in the following error: