docs: change link

Author: phase

docs/index.md

@@ -8,4 +8,4 @@ You can go to [github.com/phase/o](https://github.com/phase/o) to get the latest
 If you found a bug, or want to learn how to do something, you can [submit an issue on GitHub](https://github.com/phase/o/issues).
 
 ##How do I code in this mystical language?
-If you want a taste of some O action, check out the [examples](http://o.readthedocs.org/en/latest/examples/) page. If you want to learn how to use this kick-butt language, there's a [tutorial](http://o.readthedocs.org/en/latest/tutorial/) just for that!
+If you want a taste of some O action, check out the [examples](http://o.readthedocs.org/en/latest/examples/) page. If you want to learn how to use this kick-butt language, you can start on the [Stack](http://o.readthedocs.org/en/latest/spec/stack/) page!