Fix link to Getting started page

Author: mbelton-buildkite

app/views/pages/index.html.erb

@@ -1,6 +1,6 @@
 <div class="HomeSuggestions">
   <strong>Popular:</strong>
-  <%= link_to "Getting started", "/docs/pipelines" %>,
+  <%= link_to "Getting started", "/docs/tutorials/getting-started" %>,
   <%= link_to "Defining build steps", "/docs/pipelines/defining-steps" %>,
   <%= link_to "Command steps", "/docs/pipelines/command-step" %>,
   <%= link_to "Environment variables", "/docs/pipelines/environment-variables" %>,