Use better name for contact form HTML.

src/_includes/contact.html

@@ -1,4 +1,3 @@
-<!-- CTA -->
 <section id="cta" class="wrapper style4">
   <div class="inner">
     <header>

src/_layouts/default.html

@@ -7,7 +7,7 @@
   {% include section-one.html %}
   {% include section-two.html %}
   {% include section-three.html %}
-  {% include cta.html %}
+  {% include contact.html %}
   {% include footer.html %}
   {% include foot-scripts.html %}
 </body>