Tiny update

This is just a tiny tiny update to let this project make use of the new image codec in Decker 1.64!

The file size has decreased significantly which won't matter for most people but hopefully this makes the project a little more accessible for people with slower internet connections.

There aren't any new pages yet. I'm hoping to add more in the future but I need a little more time to work on other projects first.

Thank you to everyone who has flipped through this silly little book even once, it means a lot to me.