ci: extend macOS Node.js workflow timeout

[mcollina]

Summary

Increase the reusable Node.js workflow timeout from 20 to 30 minutes for macOS jobs. Windows remains at 30 minutes and Ubuntu remains at 20 minutes.

Motivation

The macOS Node.js 22 job in run 33859213479 was cancelled while WPT was still actively progressing at the 20-minute job timeout. The Node.js 26 macOS job in the same run completed WPT only seconds before reaching the same boundary.

This gives slower macOS runners enough time to finish WPT and cleanup without weakening the timeout for faster Ubuntu jobs.

Validation

• npm run lint
• Parsed all workflow YAML files with the repository yaml package
• git diff --check

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 93.52%. Comparing base (eb04cc3) to head (0ef6fae).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5775      +/-   ##
==========================================
- Coverage   93.53%   93.52%   -0.02%     
==========================================
  Files         110      110              
  Lines       39324    39324              
==========================================
- Hits        36780    36776       -4     
- Misses       2544     2548       +4     

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