chore(deps): update ghcr.io/vexxhost/openstack-venv-builder:2023.1 docker digest to 762788f (stable/2023.1)

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
ghcr.io/vexxhost/openstack-venv-builder	stage	digest	f0b425e → 762788f

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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:4017eb1
ghcr.io/vexxhost/python-openstackclient:latest

Digest: ghcr.io/vexxhost/python-openstackclient@sha256:8d6689efcefe1adc1883e614f02f1acc3688de5d200bf76d7942e13c539ec16d