chore(deps): update ghcr.io/vexxhost/openstack-venv-builder:2023.2 docker digest to 9a73132 (stable/2023.2)

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
ghcr.io/vexxhost/openstack-venv-builder	stage	digest	d5b19f1 → 9a73132

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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:01cf554
ghcr.io/vexxhost/python-openstackclient:latest

Digest: ghcr.io/vexxhost/python-openstackclient@sha256:bf77df25871d719b88dd6cf62c6716927af90eb41bdd04e9b5f18ef68fb2cafc