build(deps): bump github.com/docker/docker from 20.10.14+incompatible to 20.10.21+incompatible#29

dependabot[bot] wants to merge 1 commit intorelease-3.9singularityhub/singularity:release-3.9from

dependabot/go_modules/release-3.9/github.com/docker/docker-20.10.21incompatiblesingularityhub/singularity:dependabot/go_modules/release-3.9/github.com/docker/docker-20.10.21incompatibleCopy head branch name to clipboard