doveadm-director.1: drop acute accent

doveadm-director.1: drop acute accent

Found by Lintian:

    This manual page uses the \' groff sequence. Usually, the intent to
    generate an apostrophe, but that sequence actually renders as a an acute
    accent.

    For an apostrophe or a single closing quote, use plain '. For single
    opening quote, i.e. a straight downward line ' like the one used in
    shell commands, use \(aq.

Gbp-Pq: Name doveadm-director.1-drop-acute-accent.patch