SUSE-SU-2025:20596-1 Security update for libssh

This update for libssh fixes the following issues: - CVE-2025-5372: sshkdf returns a success code on certain failures bsc1245314 - CVE-2025-5987: Invalid return code for chacha20 poly1305 with OpenSSL backend bsc1245317 - CVE-2025-4877: Write beyond bounds in binary to base64 conversion functions...