openSUSE Leap 15.4 SUSE-SU-2026-0906-1 ClamAV Moderate DoS Issue

## This update for clamav fixes the following issues: Update to clamav 1.5.2: Security issue: * CVE-2026-20031: improper error handling in the HTML CSS module when splitting UTF-8 strings can lead to denial of service conditions via a crafted HTML file (bsc#1259207). Non security issue: * Support transactional updates (jsc#PED-14819). Changelog: * Fixed a possible infinite loop when scanning some JPEG files by upgrading affected ClamAV dependency, a Rust image library. * The CVD verification process will now ignore certificate files in the CVD certs directory when the user lacks read permissions. * Freshclam: Fix CLD verification bug with PrivateMirror option. * Upgraded the Rust bytes dependency to a newer version to resolve RUSTSEC-2026-0007 advisory.