update constraint for keystoneauth1 to new release 5.6.1

meta: version: 5.6.1
meta: team: keystone
meta: diff-start: -
meta: series: caracal
meta: branch: stable/2024.1
meta: release-type: release
meta: pypi: yes
meta: first: no
meta: release:Author: Felipe Reyes <felipe.reyes@canonical.com>
meta: release:Commit: Felipe Reyes <felipe.reyes@canonical.com>
meta: release:Change-Id: I7df462db54b00a6bb550d3bdffba6d4894a5b815
meta: release:Code-Review+2: Thierry Carrez <thierry@openstack.org>
meta: release:Code-Review+1: David Wilde <dwilde@redhat.com>
meta: release:Workflow+1: Elod Illes <elod.illes@est.tech>
meta: release:Code-Review+1: Grzegorz Grasza <xek@redhat.com>
meta: release:Code-Review+1: Artem Goncharov <artem.goncharov@gmail.com>
meta: release:Code-Review+2: Elod Illes <elod.illes@est.tech>
Change-Id: I9ab68aaee1bbf10a86b291e95e0186fbafc51296

Author: OpenStack Proposal Bot

upper-constraints.txt

@@ -540,7 +540,7 @@ cachetools===5.3.2
 ws4py===0.5.1
 sphinxcontrib-qthelp===1.0.3;python_version=='3.8'
 sphinxcontrib-qthelp===1.0.7;python_version>='3.9'
-keystoneauth1===5.6.0
+keystoneauth1===5.6.1
 statsd===4.0.1
 python-keystoneclient===5.4.0
 ceilometer===22.0.0.0rc1