Changed the liquid link in posts.

site/_posts/2012-07-01-posts.md

@@ -95,7 +95,7 @@ Linking to a PDF for readers to download:
 It’s all well and good to have posts in a folder, but a blog is no use unless
 you have a list of posts somewhere. Creating an index of posts on another page
 (or in a [template](../templates)) is easy, thanks to the [Liquid template
-language](http://liquidmarkup.org/) and its tags. Here’s a basic example of how
+language](http://wiki.shopify.com/Liquid) and its tags. Here’s a basic example of how
 to create a list of links to your blog posts:
 
 {% highlight html %}