[ovn][ipv6] Skip test_update_router_admin_state

This is same to already skipped test in [1].

[1] https://review.opendev.org/c/openstack/neutron/+/874112

Related-Bug: #2007166
Change-Id: Iafc596e1ff13c7efde5c7da417db85bb562aa3f7
(cherry picked from commit 2a8c7ff)

Author: karelyatin

zuul.d/tempest-singlenode.yaml

@@ -567,4 +567,5 @@
       # TODO(ykarel) remove once ubuntu jammy contains fixed version
       # of ovn https://bugs.launchpad.net/neutron/+bug/2007166
       tempest_exclude_regex: "\
-          (test_update_delete_extra_route)"
+          (test_update_delete_extra_route)|\
+          (test_update_router_admin_state)"