Update README.md

Author: mic-mccully

README.md

@@ -281,7 +281,7 @@ You should by now have executed a remote command, like this env command to retri
 
 At this state you now have execution rights on the machine through curling an URL. Continue to run other commands to see what you can learn about the machine as well as run on the machine.
 
-# Zip Slip
+# (Not used in the Hands-on Workshop - Reference Only) Zip Slip
 
 Create a new Maven project in your IDE of choice. I won’t judge you. Add a new dependency in your ```pom.xml``` file.