Use site function instead of .Site or $.Site

- The site function provides global access to the same data as the .Site page method.
- Current context (`.`) is never considered.

layouts/_default/terms.html

@@ -16,7 +16,7 @@
     {{- range $key, $value := .Data.Terms.Alphabetical }}
     {{- $name := .Name }}
     {{- $count := .Count }}
-    {{- with $.Site.GetPage (printf "/%s/%s" $type $name) }}
+    {{- with site.GetPage (printf "/%s/%s" $type $name) }}
     <li>
         <a href="{{ .Permalink }}">{{ .Name }} <sup><strong><sup>{{ $count }}</sup></strong></sup> </a>
     </li>