chore(deps): update dependency google_cloud_cpp to v2.31.0#369

dbolduc merged 1 commit intoGoogleCloudPlatform:mainGoogleCloudPlatform/cpp-samples:mainfrom

renovate-bot:renovate/google_cloud_cpp-2.xrenovate-bot/cpp-samples:renovate/google_cloud_cpp-2.xCopy head branch name to clipboard