deps: update gcr.io/cloud-devrel-public-resources/storage-testbench docker tag to v0.48.0#2781

sydney-munro merged 1 commit intogoogleapis:maingoogleapis/java-storage:mainfrom

renovate-bot:renovate/gcr.io-cloud-devrel-public-resources-storage-testbench-0.xrenovate-bot/java-storage:renovate/gcr.io-cloud-devrel-public-resources-storage-testbench-0.xCopy head branch name to clipboard