[Openstack-stable-maint] Stable check of openstack/oslo.upgradecheck for ref refs/heads/stable/xena failed

Build failed. https://zuul.opendev.org/t/openstack/buildset/7bf46dab4da7450885d362c1c17b99... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/f553507d3796417584b145d68f46d888 : SUCCESS in 3m 21s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/a71cdbaa96f044a9b535a8f1944f5938 : POST_FAILURE in 4m 45s - openstack-tox-py38 https://zuul.opendev.org/t/openstack/build/6d13e44548794978aaf68de3abe099d2 : SUCCESS in 5m 29s