Pulling data from a form into a comment with code

I am working with people with no programming skills but trying to enable them to make and update html code. Their challenge is to update a calender on an old website

My approch is to have them fill out a form with date, name, place and provide a link and place of an event. Then have an automation make a update with the html code with all these things in the right place.

My problem is that the automation seems to compile the html code, and i cant seem to disable this by usual means of commenting out code. I have used the same approch to generate an email insted of an update with sucess.

Have anyone had any sucess with similar automations, or have any sugesstions fix this code.