chore(deps): update ghcr.io/vexxhost/openstack-venv-builder:2025.2 docker digest to c718254 (stable/2025.2)

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
ghcr.io/vexxhost/openstack-venv-builder	stage	digest	5aeecef → c718254

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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:f12676d
ghcr.io/vexxhost/python-openstackclient:latest

Digest: ghcr.io/vexxhost/python-openstackclient@sha256:788677f0e59ab95d775a672a40aaa9e6c6bf22b01073459b2bc17364a3bcccf9