Fix flaky test_asyncprocess.py::test_simple

[crusaderky]

Relax timings to fix flaky test:

        t1 = time()
        while wr2() is not None:
            await asyncio.sleep(0.01)
            gc.collect()
            dt = time() - t1
>           assert dt < 2.0
E           assert 2.083622694015503 < 2.0

[github-actions]

Unit Test Results

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

       19 files   -        1         19 suites   - 1   10h 32m 58s ⏱️ - 22m 52s
  3 752 tests ±       0    3 646 ✔️ +       1     104 💤 ±  0  2 ❌ ±0 
34 112 runs   - 2 365  32 510 ✔️  - 2 298  1 599 💤  - 66  3 ❌ ±0 

For more details on these failures, see this check.

Results for commit af47fc0. ± Comparison against base commit ef6d4bf.