chore(deps): update ghcr.io/vexxhost/openstack-venv-builder:2025.2 docker digest to 321dc03 (#725)

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: 2025-10-14T10:18:12Z
 
-FROM ghcr.io/vexxhost/openstack-venv-builder:2025.2@sha256:735004e866dba5c55f24b64948a1815a0543b10169e1430ad53e30e4ca0d529c AS build
+FROM ghcr.io/vexxhost/openstack-venv-builder:2025.2@sha256:321dc03c607de1f6dfd545a12922e215d3e41fb6e5220e4df2e8a1f1d8779d30 AS build
 RUN <<EOF bash -xe
 uv pip install \
     --constraint /upper-constraints.txt \