src: fix copy-paste bug using wrong argument index for flags in JSUDPWrap

[cuiweixie]

…Wrap

[addaleax]

😬

Do you happen to have a regression test that you could add for this?

[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/71409/

[codecov]

Codecov Report

❌ Patch coverage is 0% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 89.77%. Comparing base (da5efc4) to head (c22c34a).
⚠️ Report is 6 commits behind head on main.

Files with missing lines	Patch %	Lines
src/js_udp_wrap.cc	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #61948      +/-   ##
==========================================
+ Coverage   88.84%   89.77%   +0.93%     
==========================================
  Files         674      674              
  Lines      204957   205605     +648     
  Branches    39309    39419     +110     
==========================================
+ Hits       182087   184575    +2488     
+ Misses      15088    13267    -1821     
+ Partials     7782     7763      -19     

Files with missing lines	Coverage Δ
src/js_udp_wrap.cc	0.80% <0.00%> (ø)

... and 184 files with indirect coverage changes

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[cuiweixie]

😬

Do you happen to have a regression test that you could add for this?

No, i do not have a test.But it is,obviously a right fix, i think.

[cuiweixie]

@addaleax Can you help with the ci failed, It seems is unrelated to this pr.

[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/71410/