chore(deps): update ghcr.io/vexxhost/openstack-venv-builder:2023.1 docker digest to c87a72a (stable/2023.1)

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
ghcr.io/vexxhost/openstack-venv-builder	stage	digest	a60d2e2 → c87a72a

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

ghcr.io/vexxhost/python-openstackclient:2023.1
ghcr.io/vexxhost/python-openstackclient:stable-2023.1
ghcr.io/vexxhost/python-openstackclient:62170c0
ghcr.io/vexxhost/python-openstackclient:latest

Digest: ghcr.io/vexxhost/python-openstackclient@sha256:bb7fbbb99a852b302892bb0c7b24daab8523c1ba8293e61c2aef8366444d7828