Fix third-party resource save location

Signed-off-by: Nikolaos Karaolidis <nick@karaolidis.com>

layouts/partials/head/rss.html

@@ -1,5 +1,3 @@
 {{ with .OutputFormats.Get "RSS" }}
-  {{ printf `
-    <link href="%s" rel="%s" type="%s" title="%s" />` .Permalink .Rel .MediaType.Type $.Site.Title | safeHTML
-  }}
+  <link href="{{- .Permalink -}}" rel="{{- .Rel -}}" type="{{- .MediaType.Type -}}" title="{{- $.Site.Title -}}" />
 {{ end }}