Fix flakey test_content_length_limit_with_multiple_reads test

[bdraco]

SSIA

[codspeed-hq]

CodSpeed Performance Report

Merging #10938 will not alter performance

_{Comparing test_content_length_limit_with_multiple_reads (638b3ab) with master (597161d)}

Summary

✅ 59 untouched benchmarks

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.77%. Comparing base (6b3672f) to head (638b3ab).
Report is 2 commits behind head on master.

✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff           @@
##           master   #10938   +/-   ##
=======================================
  Coverage   98.77%   98.77%           
=======================================
  Files         129      129           
  Lines       39455    39456    +1     
  Branches     2184     2184           
=======================================
+ Hits        38970    38971    +1     
  Misses        337      337           
  Partials      148      148           

Flag	Coverage Δ
CI-GHA	98.65% <100.00%> (+<0.01%)	⬆️
OS-Linux	98.36% <100.00%> (+<0.01%)	⬆️
OS-Windows	96.54% <100.00%> (+<0.01%)	⬆️
OS-macOS	97.51% <100.00%> (+<0.01%)	⬆️
Py-3.10.11	97.40% <100.00%> (-0.01%)	⬇️
Py-3.10.17	97.94% <100.00%> (-0.01%)	⬇️
Py-3.11.12	98.02% <100.00%> (+0.04%)	⬆️
Py-3.11.9	97.48% <100.00%> (-0.01%)	⬇️
Py-3.12.10	98.42% <100.00%> (+<0.01%)	⬆️
Py-3.13.3	98.41% <100.00%> (+<0.01%)	⬆️
Py-3.9.13	97.28% <100.00%> (+<0.01%)	⬆️
Py-3.9.22	97.80% <100.00%> (-0.01%)	⬇️
Py-pypy7.3.16	93.53% <100.00%> (-3.84%)	⬇️
VM-macos	97.51% <100.00%> (+<0.01%)	⬆️
VM-ubuntu	98.36% <100.00%> (+<0.01%)	⬆️
VM-windows	96.54% <100.00%> (+<0.01%)	⬆️

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[patchback]

Backport to 3.12: 💚 backport PR created

✅ Backport PR branch: patchback/backports/3.12/77c0115eb878ad797cc6ac127001fdaa7f3efc40/pr-10938

Backported as #10939

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