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: I4ae059fe095378c3ee3b072b6216908a8988bf26

zuul.d/layout.yaml

@@ -1,7 +1,7 @@
 - project:
     templates:
       - tripleo-buildimage-jobs
-      - openstack-python3-yoga-jobs
+      - openstack-python3-zed-jobs
       - release-notes-jobs-python3
     post:
       jobs: