Fix collection of node host names for apparmor profile distribution

Author: aivantsov

content/en/docs/tutorials/security/apparmor.md

@@ -132,7 +132,7 @@ discussed in [Setting up nodes with profiles](#setting-up-nodes-with-profiles).
 
 ```shell
 # This example assumes that node names match host names, and are reachable via SSH.
-NODES=($(kubectl get nodes -o name))
+NODES=($(kubectl get nodes -o name | cut -d/ -f2))
 
 for NODE in ${NODES[*]}; do ssh $NODE 'sudo apparmor_parser -q <<EOF
 #include <tunables/global>