chore(users): Add @excalidraw & @MaggieAppleton to users

Author: MichaelDeBoey

other/USERS.md

@@ -3,9 +3,14 @@
 If you or your company uses this project, add your name to this list! Eventually
 we may have a website to showcase these (wanna build it!?)
 
+- [Excalidraw](https://excalidraw.com) uses it in their
+  [blog](https://github.com/excalidraw/excalidraw-blog) &
+  [guides](https://github.com/excalidraw/excalidraw-howto)
 - [Gatsby](https://gatsbyjs.org) uses it in their
   [website](https://github.com/gatsbyjs/gatsby/tree/master/www)
 - [Kent C. Dodds](https://kentcdodds.com) uses it in
   [his personal website](https://github.com/kentcdodds/kentcdodds.com)
+- [Maggie Appleton](https://maggieappleton.com) uses it in
+  [her personal website](https://github.com/MaggieAppleton/maggieappleton.com)
 - [Anurag Hazra](https://anuraghazra.github.io) uses it in
   [his personal website](https://github.com/anuraghazra/anuraghazra.github.io)