Update jobs according to tested runtimes for 2027.1

Python 3.14 is the upper version officially tested/supported.

Depends-on: https://review.opendev.org/c/openstack/openstack-zuul-jobs/+/1007297
Depends-on: https://review.opendev.org/c/openstack/neutron/+/1007286
Change-Id: I7384deaae79694796d1a267c793d9633b4cea335
Signed-off-by: Takashi Kajinami <kajinamit@oss.nttdata.com>

.zuul.yaml

@@ -16,6 +16,6 @@
     periodic-weekly:
       jobs:
         - openstack-tox-py311
-        - openstack-tox-py313
-        - openstack-tox-py313-with-oslo-master
+        - openstack-tox-py314
+        - openstack-tox-py314-with-oslo-master
         - neutron-tempest-plugin-tap-as-a-service