chore(deps): update ghcr.io/vexxhost/openstack-venv-builder:2026.1 docker digest to 72a454b (stable/2026.1)

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
ghcr.io/vexxhost/openstack-venv-builder	stage	digest	8889811 → 72a454b

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renovate[bot]
This pull request has been included in the following image tags:

ghcr.io/vexxhost/python-openstackclient:2026.1
ghcr.io/vexxhost/python-openstackclient:stable-2026.1
ghcr.io/vexxhost/python-openstackclient:8d9de7b
ghcr.io/vexxhost/python-openstackclient:latest

Digest: ghcr.io/vexxhost/python-openstackclient@sha256:82343a76f093aec0c27e98281ab9cf647c9d6a667274ff4617ca25c3093f65ee