chore(deps): update ghcr.io/vexxhost/openstack-venv-builder:2025.1 docker digest to 99febdd (stable/2025.1)

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
ghcr.io/vexxhost/openstack-venv-builder (changelog)	stage	digest	1c131a9 -> 99febdd

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

ghcr.io/vexxhost/python-openstackclient:2025.1
ghcr.io/vexxhost/python-openstackclient:stable-2025.1
ghcr.io/vexxhost/python-openstackclient:7f821fc
ghcr.io/vexxhost/python-openstackclient:latest

Digest: ghcr.io/vexxhost/python-openstackclient@sha256:5709f5519a22d4895c059fd466d16f9a4752974a80d42638e51c12cde44a8243