Bump cloud-sql-connectors/cloud-sql-proxy from 2.19.0-alpine to 2.20.0-alpine in /deps#1836

dependabot[bot] wants to merge 3 commits intomainsigstore/scaffolding:mainfrom

dependabot/docker/deps/cloud-sql-connectors/cloud-sql-proxy-2.20.0-alpinesigstore/scaffolding:dependabot/docker/deps/cloud-sql-connectors/cloud-sql-proxy-2.20.0-alpineCopy head branch name to clipboard