Update responses/09_new-action.md

Co-Authored-By: Briana Swift <brianamarie@github.com>

Author: mattdavis0351

responses/09_new-action.md

@@ -4,7 +4,7 @@ Before we continue we are going to need to do a few things. First and foremost o
 
 ### :keyboard: Activity: Setting up the next action
 
-1. [Edit]({{workflowFile}}) your workflow file by commenting out every single line.
+1. [Edit]({{workflowFile}}) your workflow file by commenting out every single line. _(To comment in `.yml`, add a `#` symbol to the beginning of every line)_.
 2. Commit the changes to a new branch and name it `action-two`.
 3. Create a pull request named **External APIs**
 4. Supply the pull request with body content. Remember, this area can be used a notes later.