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

Build failed. https://zuul.opendev.org/t/openstack/buildset/df4a3eeb59b14d039483abcef7117a... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/3332d1ce32a94a9c8bf379cd20e4c4f8 : SUCCESS in 3m 50s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/b4e56f2f102a4ac8b1acc373ba5c6e43 : SUCCESS in 3m 28s - openstack-tox-py38 https://zuul.opendev.org/t/openstack/build/f9cfff873e06461da137a86ea03a6afd : POST_FAILURE in 4m 14s