caching stylesheet

Author: mscroggs

_includes/_head.html

@@ -5,7 +5,7 @@
     <meta charset='utf-8'>
     <meta http-equiv="X-UA-Compatible" content="IE=edge">
     <meta name="viewport" content="width=device-width,maximum-scale=2">
-    <link rel="stylesheet" type="text/css" media="screen" href="{{ '/assets/css/style.css?v=' | append: site.github.build_revision | relative_url }}">
+    <link rel="stylesheet" type="text/css" media="screen" href="/assets/css/style.css?v=2023-12-11">
 
     <link rel="apple-touch-icon" sizes="57x57" href="/assets/icons/apple-icon-57x57.png">
     <link rel="apple-touch-icon" sizes="60x60" href="/assets/icons/apple-icon-60x60.png">