chore(deps): update ghcr.io/vexxhost/openstack-venv-builder:main docker digest to cac5fdf (#769)

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:main@sha256:757a611b5f2d57ffe4493a48d26bfd095a7a62098fae07d19a7af7d04bed48d3 AS build
+FROM ghcr.io/vexxhost/openstack-venv-builder:main@sha256:cac5fdf4a7016b77bb139220f30ad7166bd05db9cc78db0cf9cac1f5ad7510ab AS build
 RUN --mount=type=bind,from=octavia,source=/,target=/src/octavia,readwrite \
     --mount=type=bind,from=ovn-octavia-provider,source=/,target=/src/ovn-octavia-provider,readwrite <<EOF bash -xe
 uv pip install \