chore(deps): update ghcr.io/vexxhost/openstack-venv-builder:2025.2 docker digest to 514b31a (stable/2025.2)

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
ghcr.io/vexxhost/openstack-venv-builder	stage	digest	3556a82 → 514b31a

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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:453acef
ghcr.io/vexxhost/python-openstackclient:latest

Digest: ghcr.io/vexxhost/python-openstackclient@sha256:6bea6e0053340026a4eed88f53a8dd854dda9a48eb74488bf26cbba33b7a3ab2