[InterNetNews/inn] aa21c7: Improve documentation for icdsynccount

[Julien ÉLIE]

  Branch: refs/heads/main
  Home:   https://github.com/InterNetNews/inn
  Commit: aa21c726e855d92a17fa0f55198c6bdecd03190d
      https://github.com/InterNetNews/inn/commit/aa21c726e855d92a17fa0f55198c6bdecd03190d
  Author: Julien ÉLIE <Julien-Elie at users.noreply.github.com>
  Date:   2023-07-08 (Sat, 08 Jul 2023)

  Changed paths:
    M doc/pod/inn.conf.pod

  Log Message:
  -----------
  Improve documentation for icdsynccount

Thanks to Russ Allbery for the new wording.