Add link to KCP remediation guidelines

Update the limitation and caveats section with a link to the KCP remediation guidelines for more detail

Signed-off-by: Scott Lowe <[email protected]>

docs/book/src/tasks/healthcheck.md

@@ -131,7 +131,7 @@ There are scenarios where remediation for a machine may be undesirable (eg. duri
 Implicit skipping when the resource is paused (using `cluster.x-k8s.io/paused` annotation):
 - When a cluster is paused, none of the machines in that cluster are considered for remediation.
 - When a machine is paused, only that machine is not considered for remediation.
-- A cluster or a machine is usually paused automatically by cluster api when it detects a migration.
+- A cluster or a machine is usually paused automatically by Cluster API when it detects a migration.
 
 Explicit skipping using `cluster.x-k8s.io/skip-remediation` annotation:
 - Users can also skip any machine for remediation by setting the `cluster.x-k8s.io/skip-remediation` for that machine.
@@ -141,6 +141,7 @@ Explicit skipping using `cluster.x-k8s.io/skip-remediation` annotation:
 Before deploying a MachineHealthCheck, please familiarise yourself with the following limitations and caveats:
 
 - Only Machines owned by a MachineSet or a KubeadmControlPlane can be remediated by a MachineHealthCheck (since a MachineDeployment uses a MachineSet, then this includes Machines that are part of a MachineDeployment)
+- Machines managed by a KubeadmControlPlane are remediated according to [the delete-and-recreate guidelines described in the KubeadmControlPlane proposal](https://github.com/kubernetes-sigs/cluster-api/blob/master/docs/proposals/20191017-kubeadm-based-control-plane.md#remediation-using-delete-and-recreate)
 - If the Node for a Machine is removed from the cluster, a MachineHealthCheck will consider this Machine unhealthy and remediate it immediately
 - If no Node joins the cluster for a Machine after the `NodeStartupTimeout`, the Machine will be remediated
 - If a Machine fails for any reason (if the FailureReason is set), the Machine will be remediated immediately