libpng security update

2:1.6.40-8.2 - fix CVE-2026-25646: heap buffer overflow in pngsetquantize RHEL-148323 - fix CVE-2026-22695: heap buffer over-read in pngimagefinishread RHEL-148818 - fix CVE-2026-22801: heap buffer over-read in pngimagewritebit RHEL-146645...