SUSE-SU-2025:4143-1 Security update for grub2

This update for grub2 fixes the following issues: - CVE-2025-54771: Fixed rubfileclose does not properly controls the fs refcount bsc1252931 - CVE-2025-61661: Fixed out-of-bounds write in grubusbgetstring function bsc1252932 - CVE-2025-61662: Fixed missing unregister call for gettext command may...