chore: fix artifact name

Author: georgelima

lib/rustler_mjml/native.ex

@@ -1,5 +1,5 @@
 defmodule RustlerMjml.Native do
-  version = "0.0.2"
+  version = Mix.Project.config()[:version]
 
   use RustlerPrecompiled,
     otp_app: :rustler_mjml,

mix.exs

@@ -1,10 +1,12 @@
 defmodule RustlerMjml.MixProject do
   use Mix.Project
 
+  @version "0.0.3"
+
   def project do
     [
       app: :rustler_mjml,
-      version: "0.1.0",
+      version: @version,
       elixir: "~> 1.13",
       start_permanent: Mix.env() == :prod,
       deps: deps()