Update arm ci jobs

Update "openstack-python3-xena-jobs-arm64" to "openstack-python3-zed-jobs-arm64".

Change-Id: I02c543c40a5c4c60f53b24ff6b6efd44113062a7

.zuul.yaml

@@ -2,7 +2,7 @@
     templates:
       - check-requirements
       - openstack-python3-zed-jobs
-      - openstack-python3-xena-jobs-arm64
+      - openstack-python3-zed-jobs-arm64
       - publish-openstack-docs-pti
       - release-notes-jobs-python3
     check: