[Yoga] Release puppet-ceilometer

This is a convenience release before moving Yoga to extended maintenance
(estimated 2023-11-02).

$ git log --oneline --no-merges 20.3.0..4aba0c1
4aba0c1 Add "tenant_name_discovery" to all namespaces
9d54bcd Add new parameter `tenant_name_discovery`
7768fad polling: Ensure unused parameters are cleared
f43133f Update TOX_CONSTRAINTS_FILE for stable/yoga
688203a Update .gitreview for stable/yoga

Change-Id: Ic3902b03188b984cca9500953435a4a731c73a4f
Signed-off-by: Hervé Beraud <hberaud@redhat.com>

deliverables/yoga/puppet-ceilometer.yaml

@@ -20,9 +20,14 @@ releases:
       - hash: cd5746f34f6d98ee1364916e5071d9245d31d53c
         repo: openstack/puppet-ceilometer
     version: 20.3.0
+  - version: 20.4.0
+    projects:
+      - repo: openstack/puppet-ceilometer
+        hash: 735e3e9c9151297761796c83b709aa581dfff024
 repository-settings:
   openstack/puppet-ceilometer: {}
 branches:
   - name: stable/yoga
     location: 20.3.0
-release-notes: https://docs.openstack.org/releasenotes/puppet-ceilometer/yoga.html
+release-notes:
+  https://docs.openstack.org/releasenotes/puppet-ceilometer/yoga.html