chore(deps): update ghcr.io/vexxhost/openstack-venv-builder:2025.1 docker digest to 869f29c

Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

Dockerfile

@@ -1,7 +1,7 @@
 # SPDX-FileCopyrightText: © 2025 VEXXHOST, Inc.
 # SPDX-License-Identifier: GPL-3.0-or-later
 
-FROM ghcr.io/vexxhost/openstack-venv-builder:2025.1@sha256:daf9f341e04ad16ed24781d369253276ce07fd084255592bb66927d631dfe5bb AS build
+FROM ghcr.io/vexxhost/openstack-venv-builder:2025.1@sha256:869f29c637ffbb653c4607e1f83c8d9cc2200d991a1afcab8d0dca1efdda20ba AS build
 RUN \
   --mount=type=bind,from=horizon,source=/,target=/src/horizon,readwrite \
   --mount=type=bind,from=designate-dashboard,source=/,target=/src/designate-dashboard,readwrite \