chore(deps): update ghcr.io/vexxhost/openstack-venv-builder:2025.2 docker digest to 4cbd88a (#317)

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:c559b33dad2e4dcda5dd233fce86b24b091d6e790c2378841a5519f2309e77e2 AS build
+FROM ghcr.io/vexxhost/openstack-venv-builder:2025.2@sha256:4cbd88a612e6abdd2c3d7e45a71b603750bbbb8ddd503168fdb28c821d343727 AS build
 RUN <<EOF bash -xe
 uv pip install \
     --constraint /upper-constraints.txt \