Description of problem:

The documentation about changing the cluster MTU (https://docs.openshift.com/container-platform/4.11/networking/changing-cluster-network-mtu.html, https://github.com/openshift/openshift-docs/blob/main/modules/nw-cluster-mtu-change.adoc) defines the placeholder <node_name> in Procedure -> 2.iv. as: "Specifies the hardware MTU for the primary network interface." which makes no sense and should be "Specifies the name of a node in your cluster."

Proposed patch for nw-cluster-mtu-change.adoc is attached.