chore(deps): update ghcr.io/vexxhost/openstack-venv-builder:main docker digest to c912ab8

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: 2024-06-25T22:49:25Z
 
-FROM ghcr.io/vexxhost/openstack-venv-builder:main@sha256:d47d2e2bf1498b2e4e36f5f645e41d995104d7d28ffa6ecadb96447f28b09680 AS build
+FROM ghcr.io/vexxhost/openstack-venv-builder:main@sha256:c912ab8ca8614cf9aa6cae9b2d231fbcf51c2f440121b695299add2dad888b54 AS build
 RUN <<EOF bash -xe
 uv pip install \
     --constraint /upper-constraints.txt \