[Yoga] Release puppet-ironic

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

$ git log --oneline --no-merges 20.3.0..f169e76
f169e76 Fix efi file paths in RHEL
32a6c1f Copy shim and grub efi binaries to tftp root
2745385 inspector: Fix wrong group of policy file
f63b1bd Ubuntu: Use ipxe.efi instead of snponly.efi in Focal
3d5e2c5 Debian/Ubuntu: Fix wrong source path to copy efi file
fca5c06 Debian/Ubuntu: Fix installation of pxelinux.0 and syslinux files
1e2207a Debian/Ubuntu: The staging driver package is not available
45d292e Debian/Ubuntu: Do not use the ironic-inspector-dnsmasq service
899e7e8 conductor: Support tuning of heartbeats
6cca155 Debian/Ubuntu: Use tftpd-hpa instead of tftpd
1d21de3 Do not show diffs of image files
f511f93 Refactor unit tests of ironic::pxe
7dfd9b9 Stable-only: Fix the ignored kernel_append_params parameter
4a97b33 Inspector: Fix missing log-facility when tftp protocol is used
07b7574 Remove TripleO job
9170535 Update TOX_CONSTRAINTS_FILE for stable/yoga
cd9c0fa Update .gitreview for stable/yoga

Change-Id: I4e823135a71e09aad14aea8668eb980154dd1bca
Signed-off-by: Hervé Beraud <hberaud@redhat.com>

deliverables/yoga/puppet-ironic.yaml

@@ -20,6 +20,10 @@ releases:
       - hash: 58f113cba14ffb94094521a7ef6d5fde6fceb055
         repo: openstack/puppet-ironic
     version: 20.3.0
+  - version: 20.4.0
+    projects:
+      - repo: openstack/puppet-ironic
+        hash: 9fdcdd8e7f8a57c91e46b0451414e26894e00bd5
 repository-settings:
   openstack/puppet-ironic: {}
 branches: