mkDocsAdmonition: escape the admonition title with html.EscapeString
before inserting it into the Confluence storage format XML. An unescaped
title containing '<', '>', '&', or '"' would break the XML structure.
image: add a len(attachments)==0 guard before accessing attachments[0]
in the local-attachment code path. ResolveLocalAttachments always returns
either an error or the requested attachments, so this is currently
unreachable, but the explicit check prevents a future silent panic if the
function's behaviour changes.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
