Fix another link in Learning Elixir post

site/posts/2019-10-10-learning-elixir.md

@@ -13,7 +13,7 @@ To actually learn Elixir, I did a few things. I started by reading through the o
 
 I strongly believe that the best way to learn a programming language (especially if you already know others) is to just start writing code. [Exercism](https://exercism.io/tracks/elixir) is a resource I've found to be quite useful in that process. It has a sequence of programming challenges that increase in difficulty, so it gives you a good feel for what it's like to use Elixir to actually solve problems and helps shift your brain into thinking about problems in a functional context.
 
-By this point, it was almost December, so I decided I was going to try to do the [Advent of Code](https://adventofcode) problems only using Elixir. These challenges were more difficult than the Exercism ones, but they provided the same benefit of letting me get experience actually writing Elixir and solving problems with it an isolated context, without a whole bunch of moving parts.
+By this point, it was almost December, so I decided I was going to try to do the [Advent of Code](https://adventofcode.com) problems only using Elixir. These challenges were more difficult than the Exercism ones, but they provided the same benefit of letting me get experience actually writing Elixir and solving problems with it an isolated context, without a whole bunch of moving parts.
 
 I knew what I ultimately wanted to do with Elixir was build web apps, so after that I went through the official [Phoenix Guide](https://hexdocs.pm/phoenix/overview.html) which explains the overall architecture of the Phoenix framework and shows you how a bunch of common patterns and techniques for building webapps with it.