chore(main): release 2.21.0#2532

kgala2 merged 2 commits intomainGoogleCloudPlatform/cloud-sql-proxy:mainfrom

release-please--branches--main--components--cloud-sql-proxyGoogleCloudPlatform/cloud-sql-proxy:release-please--branches--main--components--cloud-sql-proxyCopy head branch name to clipboard