Update dependency highlight.js to v11.9.0

Author: renovate[bot]

themes/makedeb/layouts/partials/head.html

@@ -11,7 +11,7 @@
 	<link rel="stylesheet" href="{{ $style.Permalink }}">
 
 	<!-- Syntax highlighting in code blocks -->
-        <script src="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.6.0/highlight.min.js"></script>
+        <script src="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.9.0/highlight.min.js"></script>
         <script>hljs.highlightAll();</script>
 	<script src="/js/codeblock-copy.js"></script>
 </head>