This commit fixes the issue of too many handles on win32 when `--jobs=auto`.
This is done by setting the `job_count` to the minimum value between
`multiprocessing.cpu_count()` and 61.  This happens when a machine has >
61 logic processors and `multiprocessing.cpu_count()` returns a value
greater than 61.

See [Python Issue 26903](https://bugs.python.org/issue26903) for more information.

Example failure for Python 3.10.15 with flake8 7.1.0 on Windows 11:

```bash
flake8.EXE myfile.py --jobs=auto
Exception in thread Thread-1 (_handle_workers):
Traceback (most recent call last):
  File "lib\threading.py", line 1016, in _bootstrap_inner
    self.run()
  File "lib\threading.py", line 953, in run
    self._target(*self._args, **self._kwargs)
  File "lib\multiprocessing\pool.py", line 522, in _handle_workers
    cls._wait_for_updates(current_sentinels, change_notifier)
  File "lib\multiprocessing\pool.py", line 502, in _wait_for_updates
    wait(sentinels, timeout=timeout)
  File "lib\multiprocessing\connection.py", line 879, in wait
    ready_handles = _exhaustive_wait(waithandle_to_obj.keys(), timeout)
  File "lib\multiprocessing\connection.py", line 811, in _exhaustive_wait
    res = _winapi.WaitForMultipleObjects(L, False, timeout)
ValueError: need at most 63 handles, got a sequence of length 194
```