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

Build failed. https://zuul.opendev.org/t/openstack/buildset/e5f5b3621899418ba642116579cbab... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/4fc2761ea0c5435fb8eb13c3c59008e9 : TIMED_OUT in 31m 00s - openstack-tox-py38 https://zuul.opendev.org/t/openstack/build/4b4057f6c7864a1e9a1a15219f56d2aa : TIMED_OUT in 40m 39s - openstack-tox-py39 https://zuul.opendev.org/t/openstack/build/7e8f24b42776424e87f7b67ed84c7988 : TIMED_OUT in 40m 49s