Switch to Antelope images (#1227)

diff --git a/images/magnum/Dockerfile b/images/magnum/Dockerfile
index 6abfca0..81af79f 100644
--- a/images/magnum/Dockerfile
+++ b/images/magnum/Dockerfile
@@ -23,9 +23,11 @@
 RUN mv /${TARGETOS}-${TARGETARCH}/helm /usr/bin/helm
 
 FROM registry.atmosphere.dev/library/openstack-venv-builder:${RELEASE} AS build
-ARG MAGNUM_GIT_REF=c613ea4e419edc0086116da07e93cf19206746e1
+ARG MAGNUM_GIT_REF=30ab9c9f5c7d5787054560e0527314509e61a897
 ADD --keep-git-dir=true https://opendev.org/openstack/magnum.git#${MAGNUM_GIT_REF} /src/magnum
 RUN git -C /src/magnum fetch --unshallow
+COPY patches/magnum /patches/magnum
+RUN git -C /src/magnum apply --verbose /patches/magnum/*
 RUN --mount=type=cache,mode=0755,target=/root/.cache/pip,sharing=private <<EOF bash -xe
 pip3 install \
     --constraint /upper-constraints.txt \