Security fix for the ALT Linux 9 package dovecot version 2.3.13-alt1

2.3.13-alt1 built Jan. 18, 2021 Andrey Cherepanov in task 264566 Jan. 12, 2021 Andrey Cherepanov - Updated to 2.3.13 fixes CVE-2020-24386, CVE-2020-25275...