OPENSUSE-SU-2026:20812-1 Security update for cups

This update for cups fixes the following issues - CVE-2026-27447: Authorization bypass via case-insensitive group-member lookup bsc1261572. - CVE-2026-34978: Path traversal in RSS notify-recipient-uri enables file write outside CacheDir/rss bsc1261571. - CVE-2026-34979: Heap overflow in getoption...