nova: Release Ussuri 21.2.3

$ git log --oneline --no-merges 21.2.2..HEAD
5ded5d8050 [stable-only] Set lower-constraints job as non-voting
0997043f45 address open redirect with 3 forward slashes
fa0ad18619 Fix 1vcpu error with multiqueue and vif_type=tap
d43b88a334 Reduce mocking in test_reject_open_redirect for compat
719e651e6b Reject open redirection in the console proxy
59249697bf Initialize global data separately and run_once in WSGI app init
91314f7fbb Move 'check-cherry-picks' test to gate, n-v check
b96f93ed86 Honor [neutron]http_retries in the manual client
637402eec7 guestfs: With libguestfs >= v1.41.1 decode returned bytes to string
8a858eca55 Dynamically archive FK related records in archive_deleted_rows
37cff3c74d Add functional test for bug 1837995
a8624cdaa2 Centralize sqlite FK constraint enforcement

Change-Id: Iea66a77aa41f49e4e57351cbf2a0fa2634d88fb5

deliverables/ussuri/nova.yaml

@@ -69,6 +69,10 @@ releases:
     projects:
       - repo: openstack/nova
         hash: 78c19c8f27817812ad9180e2dc93f38832de0dce
+  - version: 21.2.3
+    projects:
+      - repo: openstack/nova
+        hash: 6f774f226bcf8c5468de92d3eea80962656754cd
 branches:
   - name: stable/ussuri
     location: 21.0.0.0rc1