Bump version to "v20.0.0-rc.4" with changelog.#30393

jkrems merged 1 commit intoangular:20.0.xangular/angular-cli:20.0.xfrom

jkrems:release-stage-20.0.0-rc.4jkrems/angular-cli:release-stage-20.0.0-rc.4Copy head branch name to clipboard