Update min-node-version in release.yml to 18

[szegedi]

What does this PR do?:
Updates min-node-version in release.yml to 18

Motivation:
Can't ship a release without fixing this as #215 uses V8 API present in 18+.

JIRA: SCP-759

[github-actions]

Overall package size

Self size: 1.58 MB
Deduped: 1.95 MB
No deduping: 1.95 MB

Dependency sizes

| name | version | self size | total size | |------|---------|-----------|------------| | source-map | 0.7.4 | 226 kB | 226 kB | | pprof-format | 2.1.0 | 111.69 kB | 111.69 kB | | p-limit | 3.1.0 | 7.75 kB | 13.78 kB | | delay | 5.0.0 | 11.17 kB | 11.17 kB | | node-gyp-build | 3.9.0 | 8.81 kB | 8.81 kB |

_{🤖 This report was automatically generated by heaviest-objects-in-the-universe}

[pr-commenter]

Benchmarks

Benchmark execution time: 2025-06-12 07:34:41

Comparing candidate commit 9e3e911 in PR branch szegedi/bump-min-release-version with baseline commit 2f6f2f8 in branch main.

Found 2 performance improvements and 0 performance regressions! Performance is the same for 89 metrics, 29 unstable metrics.

scenario:profiler-light-load-no-wall-profiler-18

• 🟩 cpu_user_time [-7.574ms; -1.408ms] or [-8.392%; -1.560%]

scenario:profiler-light-load-no-wall-profiler-22

• 🟩 cpu_user_time [-6.842ms; -1.981ms] or [-9.236%; -2.674%]