Create new bugfix release in ironic-python-agent-builder for Bobcat

Includes fix [1] to build images for Debian Bullseye and Bookworm,
that closes bug #2043112 [2]

[1] https://review.opendev.org/c/openstack/ironic-python-agent-builder/+/903550
[2] https://bugs.launchpad.net/ironic-python-agent-builder/+bug/2043112

Change-Id: Ic7d891157fdd7bdd7291ba49e8f528d3024774a9

deliverables/bobcat/ironic-python-agent-builder.yaml

@@ -12,6 +12,10 @@ releases:
     projects:
       - repo: openstack/ironic-python-agent-builder
         hash: 7c2e1b341d6ddc8340b232be92b0e379ce861d41
+  - version: 5.2.1
+    projects:
+      - repo: openstack/ironic-python-agent-builder
+        hash: 14978002cc0cc1944652cce047460e54287a1533
 branches:
   - name: stable/2023.2
     location: 5.2.0