chore(deps): update ghcr.io/vexxhost/openstack-venv-builder:2025.2 docker digest to 0773e23 (stable/2025.2)

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
ghcr.io/vexxhost/openstack-venv-builder	stage	digest	6e1cf35 → 0773e23

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

ghcr.io/vexxhost/python-openstackclient:2025.2
ghcr.io/vexxhost/python-openstackclient:stable-2025.2
ghcr.io/vexxhost/python-openstackclient:36d563a
ghcr.io/vexxhost/python-openstackclient:latest

Digest: ghcr.io/vexxhost/python-openstackclient@sha256:ae72c3fd246acc08e941cf3afb6ca6b6b334d515e3b5f354a96d80654f674c0b