[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/c18894c99f8548859e4f1d7b6dd28a... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/8838eeacc5ba4ee7a20cee95f67b4bcf : TIMED_OUT in 30m 56s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/020cf21066994192a407c1513bd62e28 : SUCCESS in 3m 32s - openstack-tox-py38 https://zuul.opendev.org/t/openstack/build/896e09ee43f0400b8897b9896036f329 : TIMED_OUT in 40m 41s