Fix incompatibility with new hugo version

layouts/partials/head.html

@@ -26,10 +26,10 @@
     <!-- Modify the custom.css file inside static > css to use vanilla css -->
     <!-- <link type="text/css" rel="stylesheet" href="{{ "/" | relURL }}css/custom.css"> -->
  
-    {{ with .OutputFormats.Get "RSS" }}
+    {{ with site.Home.OutputFormats.Get "RSS" }}
     {{ printf `<link rel="%s" type="%s" href="%s" title="%s" />` .Rel .MediaType.Type .Permalink $.Site.Title | safeHTML }}
     {{ end }}
-    {{- if not .Site.IsServer -}}
+    {{- if not hugo.IsServer -}}
       {{ template "_internal/google_analytics.html" . }}
     {{- end -}}
 </head>