Bump version to "v20.0.0-rc.2" with changelog.#30312

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

clydin:release-stage-20.0.0-rc.2clydin/angular-cli:release-stage-20.0.0-rc.2Copy head branch name to clipboard