tests(httplib): Fix flakey https test

[Zylphrex]

Ideally this test shouldn't even make a request anywhere but this should make it a little more stable.

This test failed 3 times on the same PR

• https://github.com/getsentry/sentry-python/actions/runs/13337072005/job/37254546574?pr=4056
• https://github.com/getsentry/sentry-python/actions/runs/13337072005/job/37254551103?pr=4056
• https://github.com/getsentry/sentry-python/actions/runs/13337072011/job/37254546356?pr=4056

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 79.56%. Comparing base (ae68d85) to head (b601c9e).
Report is 1 commits behind head on master.

✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4057      +/-   ##
==========================================
+ Coverage   79.55%   79.56%   +0.01%     
==========================================
  Files         140      140              
  Lines       15508    15508              
  Branches     2628     2628              
==========================================
+ Hits        12337    12339       +2     
  Misses       2335     2335              
+ Partials      836      834       -2     

see 2 files with indirect coverage changes

[sentrivana]

Thank you @Zylphrex!