Change hextris demo link

README.md

@@ -766,7 +766,7 @@ _Games, game servers and control panels._
 - [battlecraft](https://github.com/jbreindel/battlecraft) - Fully distributed multiplayer browser game. ([Demo](http://battlecraft.online)) `Apache-2.0` `Erlang`
 - [Clumsy Bird](https://github.com/ellisonleao/clumsy-bird) - MelonJS port of the famous Flappy Bird Game. ([Demo](http://ellisonleao.github.io/clumsy-bird/)) `MIT` `Nodejs`
 - [elevatorsaga](http://play.elevatorsaga.com/) - The elevator programming game. ([Source Code](https://github.com/magwo/elevatorsaga)) `MIT` `Javascript`
-- [Hextris](https://github.com/Hextris/hextris) - Fast paced HTML5 puzzle game inspired by Tetris. ([Demo](http://hextris.io/)) `GPL-3.0` `HTML5`
+- [Hextris](https://github.com/Hextris/hextris) - Fast paced HTML5 puzzle game inspired by Tetris. ([Demo](https://hextris.github.io/hextris)) `GPL-3.0` `HTML5`
 - [Lila](https://lichess.org/) - The forever free, adless and open source chess server powering lichess.org, with official iOS and Android client apps. ([Source Code](https://github.com/ornicar/lila)) `AGPL-3.0` `Scala`
 - [Posio](https://github.com/abrenaut/posio) - Geography multiplayer game. ([Demo](https://posio.abrenaut.com/)) `MIT` `Python`
 - [RconCli](https://github.com/gorcon/rcon-cli) - CLI for executing queries on a remote Valve Source dedicated server using the RCON Protocol. `MIT` `Go`