Increase connect timeout for test_tell_workers_when_peers_have_left

[fjetter]

I hope that this will resolve the flakynes of this test. My hypothesis is that GH actions is just so slow that this test is actually running for a while.

If the feature is actually flaky/broken, this test will now give a strong signal since we'll run in a proper test timeout

[hendrikmakait]

Thanks, @fjetter, looks reasonable to me

[github-actions]

Unit Test Results

See test report for an extended history of previous test failures. This is useful for diagnosing flaky tests.

    25 files  +    1      25 suites  +1   10h 28m 55s ⏱️ + 30m 23s
 4 132 tests ±    0   4 016 ✅ ±    0    110 💤  -  1  6 ❌ +1 
47 730 runs  +1 413  45 629 ✅ +1 371  2 095 💤 +41  6 ❌ +1 

For more details on these failures, see this check.

Results for commit ee5ffa7. ± Comparison against base commit 48509b3.