chore(deps): update ghcr.io/vexxhost/openstack-venv-builder:2026.1 docker digest to c313749 (stable/2026.1)

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
ghcr.io/vexxhost/openstack-venv-builder	stage	digest	4d8390c → c313749

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

ghcr.io/vexxhost/python-openstackclient:2026.1
ghcr.io/vexxhost/python-openstackclient:stable-2026.1
ghcr.io/vexxhost/python-openstackclient:7039531
ghcr.io/vexxhost/python-openstackclient:latest

Digest: ghcr.io/vexxhost/python-openstackclient@sha256:497220a06a52a34ecb52d64bae55d7fae06ef9af79d5d7c3c63605503094114f