chore(deps): update ghcr.io/vexxhost/openstack-venv-builder:2025.1 docker digest to 5a21fd3 (#454)

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:2025.1@sha256:05c496b8295dd9dad29189bbd37881214d08b63e6937387c4a143ca29dd30121 AS build
+FROM ghcr.io/vexxhost/openstack-venv-builder:2025.1@sha256:5a21fd3d3465dda4ee6a81679eb37543aad1fc880b4bb557d0817562951574f5 AS build
 RUN <<EOF bash -xe
 uv pip install \
     --constraint /upper-constraints.txt \