Change to navbar light (#75)

Author: dave2wave

content/theme/templates/menu.html

@@ -1,5 +1,5 @@
 <!-- nav bar -->
-<nav class="navbar navbar-expand-lg navbar-dark bg-info" aria-label="Fifth navbar example">
+<nav class="navbar navbar-expand-lg navbar-light bg-info" aria-label="Fifth navbar example">
   <div class="container-fluid">
     <a class="navbar-brand" href="/"><img src="https://apache.org/img/asf_logo.png" alt="The Apache Software Foundation" style="height: 42px;">
       <span style="position: relative; top: 5px; margin-left: 16px;">Tooling Initiative</span></a>