FIX(change .RSSLink)

This change is made to ensure compatibility with future version of hugo

layouts/partials/head.html

@@ -7,9 +7,9 @@
 
     <title>{{ .Title }} - {{ .Site.Title }}</title>
     <link rel="canonical" href="{{ .Permalink }}">
-    {{ if .RSSLink }}
-    <link href="{{ .RSSLink }}" rel="alternate" type="application/rss+xml" title="{{ .Site.Title }}">
-    {{ end }}
+    {{ with .OutputFormats.Get "rss" -}}
+    {{ printf `<link rel="%s" type="%s" href="%s" title="%s -F" />` .Rel .MediaType.Type .Permalink $.Site.Title | safeHTML }}
+    {{ end -}}
 
     <link rel="icon" type="image/x-icon" href="/favicon.ico" />