Add element id to IAC cta button on home page

Author: oredavids

pages/index/_learn-more.html

@@ -27,6 +27,7 @@ <h2>Get access to the Infrastructure as Code Library.</h2>
     <p>
       <a
         href="/infrastructure-as-code-library/"
+        id="home-browse-infra-as-code-library"
         class="btn btn-primary"
         role="button"
         ga-on="click"