Add language explaining printing the form

This stems from a Google doc discussion about the text on the first page (titled "Can you seal your Massachusetts juvenile records?").

**Comment thread:**
1. Do we bring back the part about printing? [The printing instructions in the intro page]
1. I think this might be important for prepping people's expectations about what they need to do.
1. I second mentioning printing. Maybe something like "You will need to print the finished form. Your local library may have a printer you can use for this."
1. I had a second list of steps below this line before and I can try to bring it back. We have to wait on printing instructions till we actually know what instructions we're going to give - libraries will have issues with privacy. It's a whole discussion. Would you be willing/able to add this as an issue to the repo?

Start with the first-page text titled "Can you seal your Massachusetts juvenile records?" and the intro-page printing instructions mentioned in the issue. Resolve what printing guidance is acceptable given the privacy concerns, then update the text so the finished form's printing requirements are clear.

Written by the indexing model from the issue text.