chore(deps): update ghcr.io/vexxhost/openstack-venv-builder:main docker digest to 915c082 (#800)

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@sha256:54012839c8ca6cffbc17efa264532e1e86d3168a7411e8460e5a8ec52913d744 AS build
+FROM ghcr.io/vexxhost/openstack-venv-builder:main@sha256:915c082d5325e4030ca052973f0c3e1119127f54567a1f2b7fc16a238810cff7 AS build
 RUN <<EOF bash -xe
 uv pip install \
     --constraint /upper-constraints.txt \