update constraint for keystonemiddleware to new release 10.12.0

meta: version: 10.12.0
meta: team: keystone
meta: diff-start: -
meta: series: flamingo
meta: branch: master
meta: release-type: release
meta: pypi: yes
meta: first: no
meta: release:Author: Elod Illes <elod.illes@est.tech>
meta: release:Commit: Elod Illes <elod.illes@est.tech>
meta: release:Change-Id: I4e1c6c7d2c51efca6cb6f0713031b456cdabe00f
meta: release:Code-Review+2: Elod Illes <elod.illes@est.tech>
meta: release:Code-Review+2: Thierry Carrez <thierry@openstack.org>
meta: release:Workflow+1: Thierry Carrez <thierry@openstack.org>
meta: release:Code-Review+1: Artem Goncharov <artem.goncharov@gmail.com>
Change-Id: Iaf4c1a6405e392c5ab06964a76d1efef16db78f1
Signed-off-by: Elod Illes <elod.illes@est.tech>
Generated-By: openstack/project-config:roles/copy-release-tools-scripts/files/release-tools/update_constraints.sh

Author: Elod Illes

upper-constraints.txt

@@ -361,7 +361,7 @@ XStatic-tv4===1.2.7.0
 XStatic-JSEncrypt===2.3.1.1
 python-cinderclient===9.8.0
 keystonemiddleware===10.10.0;python_version=='3.9'
-keystonemiddleware===10.11.0;python_version>='3.10'
+keystonemiddleware===10.12.0;python_version>='3.10'
 django-formtools===2.5.1
 XStatic-Spin===1.2.5.3
 rich===14.1.0