chore(deps): update ghcr.io/vexxhost/openstack-venv-builder:main docker digest to 4320ddc (#293)

Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

Dockerfile

@@ -2,7 +2,7 @@
 # SPDX-License-Identifier: GPL-3.0-or-later
 # Atmosphere-Rebuild-Time: 2024-06-25T22:49:25Z
 
-FROM ghcr.io/vexxhost/openstack-venv-builder:main@sha256:826c19854827486290b482095128d1c61ffa7b8c4ab282c561b552194014d7e5 AS build
+FROM ghcr.io/vexxhost/openstack-venv-builder:main@sha256:4320ddc549265b68d5bab8c3a2d7026c19d3820b1023029362e8422d83ae8616 AS build
 RUN --mount=type=bind,from=heat,source=/,target=/src/heat,readwrite <<EOF bash -xe
 uv pip install \
     --constraint /upper-constraints.txt \