www/nginx{,-devel}: Update to 1.30.3/1.31.2
Update nginx and nginx-devel to the latest security releases.
The quarterly branch was updated manually to account for changes
present in main that are not part of 2026Q2.
Security: CVE-2026-42055, CVE-2026-48142, CVE-2026-42530
Sponsored by: Netzkommune GmbH