chore(deps): update ghcr.io/vexxhost/openstack-venv-builder:zed docker digest to c48a981 (stable/zed)

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
ghcr.io/vexxhost/openstack-venv-builder	stage	digest	881c06d -> c48a981

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

ghcr.io/vexxhost/python-openstackclient:zed
ghcr.io/vexxhost/python-openstackclient:stable-zed
ghcr.io/vexxhost/python-openstackclient:a1b0feb
ghcr.io/vexxhost/python-openstackclient:latest

Digest: ghcr.io/vexxhost/python-openstackclient@sha256:a00c87582a08eade1198e7c4a0670158a5a7c6042ad0b8c1d0d8fa9114c026a5