chore(deps): update ghcr.io/vexxhost/openstack-venv-builder:zed docker digest to 9fff812 (stable/zed)

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
ghcr.io/vexxhost/openstack-venv-builder	stage	digest	de873f3 -> 9fff812

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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:98ea7b8
ghcr.io/vexxhost/python-openstackclient:latest

Digest: ghcr.io/vexxhost/python-openstackclient@sha256:00ebf33c3f2cb10f026f33f51ac43760f3dcfd04f8b878dc38e44183bd05895d