update description

docs/_includes/page-headers.html

 {% if page.group == "getting-started" %}
   <h1>Getting started</h1>
   <p class="lead">
-    An overview of Bootstrap, how to download and use, basic templates and examples, and more.
+    An overview of Bootstrap, including how to download and use it, some basic templates and examples, and more.
   </p>
 {% elsif page.group == "layout" %}
   <h1>Layout</h1>