Update head.html

Author: alanedelman

_layout/head.html

@@ -58,7 +58,7 @@
 
 <section class="page-header">
   <div class="project-name"><img src="/assets/julia-lab-logo.svg"></div>
-  <h2 class="project-tagline">Testing</h2>
+  <h2 class="project-tagline">  Accelerating Science through Computing   </h2>
 </section>
 
 <!-- Content appended here -->