chore(deps): update ghcr.io/vexxhost/openstack-venv-builder:zed docker digest to 3a4779b

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:zed@sha256:b96d4de7e2dcc276a37048d5a020400393aed7ed08412189e01fe48b1ff9694e AS build
+FROM ghcr.io/vexxhost/openstack-venv-builder:zed@sha256:3a4779b67529da90ec42bdafe68755d2a20549c8c698d85af09be6993755fe27 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 \