Bump scality/metadata from 8.11.0-standalone to 8.25.0-standalone in /.github/docker#6156

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dependabot/docker_compose/dot-github/docker/scality/metadata-8.25.0-standalonescality/cloudserver:dependabot/docker_compose/dot-github/docker/scality/metadata-8.25.0-standaloneCopy head branch name to clipboard