ep 3: syllabus.html

Hello!

I'm working through making an new lesson, and in episode 3 here, under 'starter files' -> 'index', it says to include syllabus.html after the .prereq block.

I cannot see any examples of this in index files from the main lessons, and it is not included in the generated index.md file. If this is not a mistake it would be very helpful if you could include more detail on how to use it.

Thanks!