MANUAL.txt: fix typo in template syntax

[Wandmalfarbe]

That seems to me to be a typo:

${months[, ]}$

${articles:bibentry()[; ]$

To mark variables and control structures in the template,
either $...$ or ${...} may be used as delimiters.
The styles may also be mixed in the same template, but the
opening and closing delimiter must match in each case.

[jgm]

thanks