Update dependency magnum-cluster-api to v0.29.3 (stable/2024.2)

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Renovate-Branch: renovate/stable/2024.2-magnum-cluster-api-0.x
Change-Id: I5a738c9c85f77d68a7b8f7ae6af7ae8d78a2a3c3
diff --git a/images/magnum/Dockerfile b/images/magnum/Dockerfile
index 0f3e68c..b8d0e2f 100644
--- a/images/magnum/Dockerfile
+++ b/images/magnum/Dockerfile
@@ -19,7 +19,7 @@
 uv pip install \
     --constraint /upper-constraints.txt \
         /src/magnum \
-        magnum-cluster-api==0.29.2
+        magnum-cluster-api==0.29.3
 EOF
 
 FROM openstack-python-runtime