Inconsistent `--numprocesses` description

[Wovchena]

pytest --help prints

With 'auto', attempt to detect physical CPU count. With 'logical', detect logical CPU count. If physical CPU count cannot be found, falls to logical count.

auto falls to logical for pytest-xdist version 3.5.0.

But https://pytest-xdist.readthedocs.io/en/stable/distribution.html states

Use -n logical to use the number of logical CPU cores rather than physical ones. This currently requires the psutil package to be installed; if it is not, pytest-xdist will fall back to -n auto behavior.

logical falls to auto