Update READme.md

Author: legah2045

kubeadm/READme.md

@@ -15,8 +15,10 @@
 + Attach Security Group to EC2 Instance/nodes.
 
 ## Assign hostname &  login as ‘root’ user because the following set of commands need to be executed with ‘sudo’ permissions.
+```sh
 sudo hostnamectl set-hostname master
 sudo -i
+```
 
 ``` sh
 # run the following below as a script