databases/galera26: Update to 26.4.13

ChangeLog:
http://releases.galeracluster.com/galera-4.13/release-notes-galera-26.4.13.txt

Notable changes and fixes in Galera since latest release 4.12:

• Complete IO for client handshake before starting an asynchronous read to fix an occasional connection failure when establishing new cluster connections
• EOF-while-reading errors now suppressed when using OpenSSL 3.0

Known Issues:

• In order to install Galera package on RHEL 8, MySQL and MariaDB modules need to be disabled first with dnf -y module disable mysql mariadb.

PR: 268038
Reported by: devel@galeracluster.com (maintainer)