Fix code blocks in dark mode (#733)

Sam A

28.55.2022 30e9adb8321c431d843aafc6acb4491341d97dce

1
2
3
{{ range .AlternativeOutputFormats -}}
  {{ printf `<link rel="%s" type="%s" href="%s" title="%s" />` .Rel .MediaType.Type .RelPermalink $.Site.Title | safeHTML }}
{{ end -}}