Use python job template for Zed

The current master should be compatible with the Zed
release of the other projects.

Related-Bug: #1974244
Signed-off-by: Chandan Kumar (raukadah) <chkumar@redhat.com>
Change-Id: I184843bc56aaa1feae97c5cb3d9b8ca28d69899d

zuul.d/layout.yaml

@@ -3,7 +3,7 @@
     templates:
       - check-requirements
       - openstack-cover-jobs
-      - openstack-python3-yoga-jobs
+      - openstack-python3-zed-jobs
       - publish-openstack-docs-pti
       - release-notes-jobs-python3
       - tripleo-multinode-container-minimal-pipeline