update man; fix #497

mw.1

@@ -28,8 +28,8 @@ delete the configuration files for an already configured email account
 .B purge
 totally purge all local mutt-wizard accounts
 .TP
-.B cron
-toggle a cronjob that will automatically sync mail with
+.B sync
+sync mail accounts then update notmuch database
 .B mailsync
 as often as you wish
 .SH DETAILS