Bumps [psutil](https://github.com/giampaolo/psutil) from 5.5.1 to 5.6.6.
- [Release notes](https://github.com/giampaolo/psutil/releases)
- [Changelog](https://github.com/giampaolo/psutil/blob/master/HISTORY.rst)
- [Commits](https://github.com/giampaolo/psutil/compare/release-5.5.1...release-5.6.6)

The only API-incompatible change in 5.6 is the removal of memory_maps() on
OSX, which we aren't relying on at this point:
  https://github.com/giampaolo/psutil/blob/master/HISTORY.rst#560



closes odoo/odoo#47632

Original-signed-off-by: dependabot[bot] <support@github.com>
X-original-commit: a6026a4f
Signed-off-by: Olivier Dony (odo) <odo@openerp.com>