fix(view): fix incorrect build path for vendor css

Author: DaftMonk

templates/views/html/index.html

@@ -11,7 +11,7 @@
     <meta name="description" content="">
     <meta name="viewport" content="width=device-width">
     <!-- Place favicon.ico and apple-touch-icon.png in the root directory -->
-    <!-- build:css styles/vendor.css -->
+    <!-- build:css(app) styles/vendor.css -->
     <!-- bower:css -->
     <!-- endbower -->
     <!-- endbuild -->