SUSE-SU-2026:21823-1 Security update for nginx

This update for nginx fixes the following issues: - CVE-2026-1642: plain text data injection into the response from an upstream proxied server bsc1257675. - CVE-2026-27654: buffer overflow in the NGINX worker process via the ngxhttpdavmodule module bsc1260416. - CVE-2026-27784: NGINX worker memor...