[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/dbe3201a42074a588592cd08bb0ceb... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/8acd74ec59d34510b3e8d7180606ef73 : TIMED_OUT in 30m 54s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/84d4200bad774c788871ff8f967f98b8 : SUCCESS in 2m 46s - openstack-tox-py38 https://zuul.opendev.org/t/openstack/build/871ee24e5f004f23b2457e1469ff5217 : TIMED_OUT in 40m 44s