Fix getting started link

Author: josevalim

src/pages/docs/index.astro

@@ -66,7 +66,7 @@ const seo = {
   <PageHero
     title="Documentation"
     description="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."
-    note='See also our <a href="https://hexdocs.pm/elixir/getting-started.html" target="_blank" rel="noopener noreferrer">Getting Started guide</a> and the <a href="/learning/">Learning page</a> for books, courses, videos, and more.'
+    note='See also our <a href="https://elixir.hexdocs.pm/introduction.html" target="_blank" rel="noopener noreferrer">Getting Started guide</a> and the <a href="/learning/">Learning page</a> for books, courses, videos, and more.'
   />
 
   {/* Stays inside the dark hero block. Negative top margin trims PageHero's