Add mosaic to notable_projects.md (#649)

Author: maciejmatu

docs/documentation/notable_projects.md

@@ -25,3 +25,5 @@ List of notable projects using boardgame.io. This list is not exhaustive. Feel f
 - [Pong240's Boardgame](https://github.com/Pong420/Boardgame) - [play](http://play-boardgame.herokuapp.com) - A project for building board games with React and boardgame.io.
 
 - [Territories](https://github.com/lehaSVV2009/territories) - [play](https://lehasvv2009.github.io/territories/) - Simple board game Territories.
+
+- [Mosaic Multiplayer](https://github.com/maciejmatu/mosaic) - [play](https://playmosaic.online/) - Azul board game clone you can play online with friends.