The Atom feed (feed.xml).
updated comes from the newest post, never the clock — the feed is part
of the byte-identical output contract (ADR 0005).
Summary
Functions
Renders the Atom feed for the given posts (newest first).
Functions
@spec render(Cherry.Site.t(), [Cherry.Content.Document.t()]) :: String.t()
Renders the Atom feed for the given posts (newest first).