Release magnum-ui RC1 for Antelope

This proposed a RC1 release for magnum-ui to get any merged changes
out prior to the RC1 deadline for Antelope going into effect.

If the team is ready to proceed, please leave a +1 to acknowledge this
release and we will process right away. If the team is working on any
final merges, leave a -1 with some detail on the status and update the
patch with the new commit hash to use when ready.

Patches with no response will be merged by early Friday, March 03.

$ git log --oneline --no-merges 11.0.0..452ca7d
452ca7d Fix tox
a994f97 Imported Translations from Zanata
273d5e1 Switch to 2023.1 Python3 unit tests and generic template name
e698ca1 Update master for stable/zed
0a7bbdd Imported Translations from Zanata
0e541e8 setup.cfg: Replace dashes by underscores
5c806bf Address RemovedInDjango40Warning
43bdc93 Remove references to sys.version_info

Signed-off-by: Hervé Beraud <hberaud@redhat.com>
Change-Id: Ib220fab6160ce20ba32140c82b147881dcdc9050

deliverables/antelope/magnum-ui.yaml

@@ -5,3 +5,11 @@ team: magnum
 type: horizon-plugin
 repository-settings:
   openstack/magnum-ui: {}
+releases:
+  - version: 12.0.0.0rc1
+    projects:
+      - repo: openstack/magnum-ui
+        hash: 452ca7da23f4489bc0dd25cfd031d4f1db04dfa6
+branches:
+  - name: stable/2023.1
+    location: 12.0.0.0rc1