chore(deps): update ghcr.io/vexxhost/openstack-venv-builder:2025.1 docker digest to 977dce8 (stable/2025.1)

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
ghcr.io/vexxhost/openstack-venv-builder	stage	digest	47352ce → 977dce8

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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:29452b8
ghcr.io/vexxhost/python-openstackclient:latest

Digest: ghcr.io/vexxhost/python-openstackclient@sha256:2fc036e01b895b85c4be5202f5f1c247498b580a1550007372043c280fca2b1e