ci: extend Windows Node.js workflow timeout

[mcollina]

Summary

Increase the reusable Node.js workflow timeout from 20 to 30 minutes for Windows jobs only.

Motivation

Windows CI on main has been getting cancelled while running WPT near the 20-minute job timeout. The WPT server shutdown lines in the logs are cleanup during cancellation, not a separate WPT assertion failure.

Evidence from the first affected run (0d6ecc571095, run 27418354554):

• Windows Node.js 22 job started at 13:21:40.
• npm run test:wpt started at 13:30:42.
• WPT was still running at 13:41:40.
• WPT server cleanup logged at 13:41:40.
• The job was cancelled at 13:41:42, right at the 20-minute job timeout boundary.

This keeps the existing 20-minute timeout for non-Windows jobs and gives Windows enough budget to finish WPT and cleanup reliably.

Validation

• git diff --check
• Parsed .github/workflows/nodejs.yml with the repository yaml package
• Commit hook ran npm run lint

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 93.36%. Comparing base (363e44f) to head (1855b49).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #5426   +/-   ##
=======================================
  Coverage   93.35%   93.36%           
=======================================
  Files         110      110           
  Lines       36993    36993           
=======================================
+ Hits        34535    34537    +2     
+ Misses       2458     2456    -2     

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