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

Build failed. https://zuul.opendev.org/t/openstack/buildset/56255442646749a1b6a6b49f4ffdc2... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/b7bcd7d707174ee49effa063312691d6 : TIMED_OUT in 31m 06s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/2c10382a959f4bf7bfb0e955eff81f14 : SUCCESS in 3m 38s - openstack-tox-py38 https://zuul.opendev.org/t/openstack/build/fe523f8d72b14df185c77bf026b04da6 : TIMED_OUT in 40m 41s