chore(deps): update ghcr.io/vexxhost/openstack-venv-builder:2023.1 docker digest to a6b76c7

Signed-off-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: 2024-06-26T17:38:39Z
 
-FROM ghcr.io/vexxhost/openstack-venv-builder:2023.1@sha256:be133105986841f75400e219983baca6fdf581506afeb07b61f064d878a2d98b AS build
+FROM ghcr.io/vexxhost/openstack-venv-builder:2023.1@sha256:a6b76c74ee688a9de612c2f6c4bde16349d3f1df3a2682bcfdff173c2be8d5c9 AS build
 RUN <<EOF bash -xe
 uv pip install \
     --constraint /upper-constraints.txt \