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

Build failed. https://zuul.opendev.org/t/openstack/buildset/b17dc90ef32e4e9c8c58115a49122f... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/71fd43580c0d4b0aa1af16bef955037b : TIMED_OUT in 31m 03s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/288af3cf399e432b9f5261436fe529ae : SUCCESS in 2m 59s - openstack-tox-py38 https://zuul.opendev.org/t/openstack/build/e6f5db5d1ad540ab8a1130222e454fb9 : TIMED_OUT in 40m 58s