Use proper link concatenation

Signed-off-by: Danila Fedorin <danila.fedorin@gmail.com>

layouts/blog/single.html

@@ -2,8 +2,8 @@
 <h2>{{ .Title }}</h2>
 <div class="post-subscript">
     <p>
-        {{- range .Params.tags }}
-        <a class="button" href="{{ $.Site.BaseURL }}/tags/{{ . | urlize }}">{{ . }}</a>
+        {{- range (.GetTerms "tags") -}}
+        <a class="button" href="{{ .Permalink }}">{{ .Title }}</a>
         {{ end -}}
     </p>
     <p>{{ i18n "postedOn" (.Date.Format "January 2, 2006") }}.</p>