www/node18: Update to 18.18.2
Changes: https://github.com/nodejs/node/blob/main/doc/changelogs/CHANGELOG_V18.md
Security: CVE-2023-38552, CVE-2023-39333, CVE-2023-44487, CVE-2023-45143
(cherry picked from commit c2a029a4c51ea55f0c0faa3acd6b71578d9e0436)