Fix the missing link to the guides page (#1581)

Author: kentaro

docs.markdown

@@ -8,7 +8,7 @@ layout: default
 
 The Elixir programming language is broken into 6 applications. The links below
 reference the documentation for the modules and functions in each of those
-applications. For a general introduction to the language, see our [guides](/guides.html).
+applications. For a general introduction to the language, see our [guides](/getting-started/introduction.html).
 
 {% assign stable = site.data.elixir-versions[site.data.elixir-versions.stable] %}