Update header.html

_includes/header.html

@@ -1,7 +1,7 @@
 <header>
     <div class="container">
               <div class="header-content">
-                        <img src="img/MockUp.png" class="img-responsive" alt="">
+                        <img src="img/headerimg.png" class="img-responsive" alt="">
                         <h1>Your personal media assistant!</h1>
                         <p>A simple way for your shared media users to request and download content - automatically! Learn how to get up and running in 5 minutes, below.</p>
                         <a href="#why" class="btn btn-filled btn-xl page-scroll">Learn More &darr;</a>