chore(deps): update ghcr.io/vexxhost/openstack-venv-builder:2023.2 docker digest to 4470a9b (stable/2023.2)

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
ghcr.io/vexxhost/openstack-venv-builder (changelog)	stage	digest	807a5dd -> 4470a9b

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

ghcr.io/vexxhost/python-openstackclient:2023.2
ghcr.io/vexxhost/python-openstackclient:stable-2023.2
ghcr.io/vexxhost/python-openstackclient:f2dde66
ghcr.io/vexxhost/python-openstackclient:latest

Digest: ghcr.io/vexxhost/python-openstackclient@sha256:7a5656f3b7fa82fa92283e3da93388c59e2a499955917fdd0ff9fb5797191589