Release ironic-lib for stable/ussuri

This release picks up new commits to ironic-lib since
the last release from stable/ussuri.

This is being proposed as a convenience to help make sure stable
changes are being released. If the team is good with this going out,
please respond with a +1 to let the release team know it is OK to
proceed.

If it is not wanted at this time, or if there are more changes that
would be good to get merged before doing a stable release, please
leave a -1 with a comment with what the team would prefer. We can
then either abandon this patch, or wait for an update with a new
commit hash to use instead.

$ git log --oneline --no-merges 4.2.2..79901af
79901af Limit the number of malloc arenas for qemu-img convert

Signed-off-by: Elod Illes <elod.illes@est.tech>
Change-Id: I8d22be4332e89a22f448a94fe6bd18c994228f1c

deliverables/ussuri/ironic-lib.yaml

@@ -31,6 +31,10 @@ releases:
     projects:
       - repo: openstack/ironic-lib
         hash: d2e477d39638d3fa9230e16f93b6a7c48092e365
+  - version: 4.2.3
+    projects:
+      - repo: openstack/ironic-lib
+        hash: 79901aff5f3c3091fd320902c806e343fb829c04
 branches:
   - name: stable/ussuri
     location: 4.2.0