[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/3f5e8bddcaa84c309b5abc7bd57368... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/9c7ad4f4e8ef4c7ebb87fb6ea269e86d : TIMED_OUT in 31m 08s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/0079ed0c6d0841b98caf0fd900f81c92 : SUCCESS in 3m 02s - openstack-tox-py38 https://zuul.opendev.org/t/openstack/build/f1092cc32a4546a1a6de894d84b890da : TIMED_OUT in 40m 42s