www/angie-module-njs: Update 0.9.6 => 0.9.9 (CVE-2026-8711)

Changelogs:
https://github.com/nginx/njs/releases/tag/0.9.7
https://github.com/nginx/njs/releases/tag/0.9.8
https://github.com/nginx/njs/releases/tag/0.9.9

PR: 295591
Security: CVE-2026-8711
Sponsored by: UNIS Labs
MFH: 2026Q2