Update stylesheet path following post-beta ship

Author: jordanmccullough

_layouts/site.html

@@ -34,7 +34,7 @@
   <script src="{{ page.leadingpath }}_javascript/curriculum.js"></script>
 
   <!--Curriculum special styling-->
-  <link rel="stylesheet" href="{{ page.leadingpath }}_stylesheets/curriculum-beta.css" type="text/css" />
+  <link rel="stylesheet" href="{{ page.leadingpath }}_stylesheets/curriculum.css" type="text/css" />
 
   {% include analytics.html %}
 </head>