test: fix small compile warning in test_network_requests_buffer.cc

[xiaocainiao633]

fix #60275

[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/69822/

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 88.57%. Comparing base (cec1bd5) to head (6ab957b).

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #60281      +/-   ##
==========================================
- Coverage   88.58%   88.57%   -0.02%     
==========================================
  Files         704      704              
  Lines      208434   208434              
  Branches    40053    40048       -5     
==========================================
- Hits       184645   184612      -33     
- Misses      15812    15861      +49     
+ Partials     7977     7961      -16     

see 38 files with indirect coverage changes

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[legendecas]

Would you mind updating the commit message by following the guide at https://github.com/nodejs/node/blob/main/doc/contributing/pull-requests.md#commit-message-guidelines? Thank you!

[xiaocainiao633]

Would you mind updating the commit message by following the guide at https://github.com/nodejs/node/blob/main/doc/contributing/pull-requests.md#commit-message-guidelines? Thank you!
Can we merge now?