bump bootstrap includes

defect 960950

Author: jacalata

docs/_includes/head.html

@@ -7,11 +7,11 @@
 
   <link rel="shortcut icon" type="image/png" href="{{ site.baseurl }}/assets/logo.png">
 
-  <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css">
+  <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.1/css/bootstrap.min.css">
   <link rel="stylesheet" href="{{ site.baseurl }}/css/main.css">
   <link rel="stylesheet" href="{{ site.baseurl }}/css/github-highlight.css">
 
   <script src="https://code.jquery.com/jquery-2.2.4.min.js"></script>
-  <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script>
+  <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.1/js/bootstrap.min.js"></script>
 
 {% if jekyll.environment == "production" %}{% include analytics.html %}{% endif %}