fix(getRequestIP): use first address of x-forwarded-for header

[pi0]

🔗 Linked issue

resolves #588

❓ Type of change

• 📖 Documentation (updates to the documentation, readme, or JSdoc annotations)
• 🐞 Bug fix (a non-breaking change that fixes an issue)
• 👌 Enhancement (improving an existing functionality like performance)
• ✨ New feature (a non-breaking change that adds functionality)
• 🧹 Chore (updates to the build process or auxiliary tools and libraries)
• ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

📝 Checklist

• I have linked an issue or discussion.
• I have updated the documentation accordingly.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (4475b74) 77.79% compared to head (e7ebf94) 77.80%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #618      +/-   ##
==========================================
+ Coverage   77.79%   77.80%   +0.01%     
==========================================
  Files          47       47              
  Lines        4279     4281       +2     
  Branches      609      610       +1     
==========================================
+ Hits         3329     3331       +2     
  Misses        933      933              
  Partials       17       17              

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[cloudflare-workers-and-pages]

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Latest commit:	e7ebf94
Status:	🚫  Build failed.

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