Update index.md

Author: GammaGames

docs/index.md

@@ -20,4 +20,4 @@ steps:
     - dirt,plants@3:-,1:buildings
 ```
 
-A full writeup on the format can be found on [my personal blog](https://www.gammagames.net/tutorials/procgen-ruleset) or [Medium](https://medium.com/@gammagames/procedural-generation-ruleset-478a7aeb4c12), the source code is available on [GitHub](https://github.com/GammaGames/procedural-generation-ruleset/blob/master/assets/scripts/tilegen.gd), and you can download a playable demo for Windows, Linux, or macOS [here](download).
+A full writeup on the format can be found on [my personal blog](https://gammagames.github.io/procedural-generation-ruleset/) or [Medium](https://medium.com/@gammagames/procedural-generation-ruleset-478a7aeb4c12), the source code is available on [GitHub](https://github.com/GammaGames/procedural-generation-ruleset/blob/master/assets/scripts/tilegen.gd), and you can download a playable demo for Windows, Linux, or macOS [here](download).