Logged out comment form doesn't mention HTML can be used

Steps to reproduce

1. Log out

2. Go to a work or news post

3. Scroll to the comment form

What happens

There's nothing telling you you can use HTML in your comment.

What should happen

At the end of the statement "All fields are required. Your email address will not be published." there should be another sentence: "Plain text with limited HTML" which should have a help link to https://test.archiveofourown.org/help/html-help.html at the end, like it does on the logged in form.