Merge PR #24598 into master

* refs/pull/24598/head:
	.github/stale.yml: configure probot/stale to automatically close stale issues

Reviewed-by: Erwan Velu <erwan@redhat.com>
Reviewed-by: Piotr Dałek <piotr.dalek@corp.ovh.com>
Reviewed-by: Lenz Grimmer <lgrimmer@suse.com>
Reviewed-by: John Spray <john.spray@redhat.com>
Reviewed-by: Jason Dillaman <dillaman@redhat.com>
Reviewed-by: Neha Ojha <nojha@redhat.com>
Reviewed-by: Gregory Farnum <gfarnum@redhat.com>