`test_httpservers` is flaky on macOS

[StanFromIreland]

Bug report

Bug description:

From our CI, example1 example2 and example3:

======================================================================
ERROR: test_single_request (test.test_httpservers.HTTP09ServerTestCase.test_single_request)
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Traceback (most recent call last):
 File "/Users/admin/actions-runner/_work/cpython/cpython/Lib/test/test_httpservers.py", line 349, in test_single_request
 res = self.sock.recv(1024)
ConnectionResetError: [Errno 54] Connection reset by peer

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Possibly an issue on GitHub's side.

CPython versions tested on:

CPython main branch, 3.13

Operating systems tested on:

macOS

[picnixz]

I fixed it in #139610.

[StanFromIreland]

That's some unfortunate timing, apologies for the noise, I was writing this issue when the PR was opened!