test: add {{ .Site.BaseURL }} back

Author: shenxianpeng

themes/devops-maturity/layouts/partials/head.html

@@ -9,7 +9,7 @@
     gtag('config', 'G-RH9YBHW509');
   </script>
 
-  <link rel="stylesheet" href="/css/style.css">
+  <link rel="stylesheet" href="{{ .Site.BaseURL }}css/style.css">
 
   <title>{{ .Param "Title" }}</title>
   <meta name="description" content="{{ .Param "Description" }}"/>