Change Elixir in Action link to 2nd edition (#1092)

learning.markdown

@@ -27,7 +27,7 @@ Elixir’s pragmatic syntax and built-in support for metaprogramming will make y
 
 <h4 class="resource">Elixir in Action</h4>
 
-<a class="cover" href="http://manning.com/juric/" title="Elixir in Action
+<a class="cover" href="https://www.manning.com/books/elixir-in-action-second-edition" title="Elixir in Action
 – by Saša Jurić"><img src="/images/learning/elixir-in-action.jpg" alt="Elixir in Action cover" width="190" /></a>
 
 Elixir in Action is a tutorial book that aims to bring developers new to Elixir and Erlang to the point where they can develop complex systems on their own. No knowledge about Elixir, Erlang, or functional programming is required, but it is assumed that a reader has a few years of production experience using mainstream OO languages, for example C#, Java, Python, or Ruby.