deps: bump github.com/cert-manager/cert-manager from 1.19.3 to 1.19.4#20

dependabot[bot] wants to merge 1 commit intomaingnmic/operator:mainfrom

dependabot/go_modules/github.com/cert-manager/cert-manager-1.19.4gnmic/operator:dependabot/go_modules/github.com/cert-manager/cert-manager-1.19.4Copy head branch name to clipboard