chore(deps): update ghcr.io/vexxhost/openstack-venv-builder:zed docker digest to 57f48e6 (stable/zed)

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
ghcr.io/vexxhost/openstack-venv-builder	stage	digest	23ec68f → 57f48e6

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

ghcr.io/vexxhost/python-openstackclient:zed
ghcr.io/vexxhost/python-openstackclient:stable-zed
ghcr.io/vexxhost/python-openstackclient:6b5492f
ghcr.io/vexxhost/python-openstackclient:latest

Digest: ghcr.io/vexxhost/python-openstackclient@sha256:03cc5612e036b84831d9ffac2091568e12c8187fe79b6d96eab2fced88aff2be