Security update for openssh

This update for openssh fixes the following issues: CVE-2025-26465: Fixed MitM attack against OpenSSH's VerifyHostKeyDNS-enabled client bsc1237040. CVE-2025-26466: Fixed DoS attack against OpenSSH's client and server bsc1237041. Other bugfixes: Fix ssh client segfault with GSSAPIKeyExchange=yes i...