Update styling for placeholder text

Author: sabrowning1

data/variables/command_line.yml

@@ -4,7 +4,7 @@ backticks: >-
 
 # Use this variable within codeblocks (because it includes HTML! Which only renders in shell codeblocks!)
 codeblock: >-
-  {% ifversion fpt or ghec %}github.com{% else %}<em>hostname</em>{% endif %}
+  {% ifversion fpt or ghec %}github.com{% else %}HOSTNAME{% endif %}
 
 # GitHub URL example
 git_url_example: >-