chore(deps): update ghcr.io/vexxhost/openstack-venv-builder:2025.2 docker digest to 3556a82 (stable/2025.2)

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
ghcr.io/vexxhost/openstack-venv-builder	stage	digest	bb02c79 → 3556a82

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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:778bb5b
ghcr.io/vexxhost/python-openstackclient:latest

Digest: ghcr.io/vexxhost/python-openstackclient@sha256:2f21b6a858f51ab339d3c21e7385648e906f2e0f123eecb263cf29c450c5c2b9