[Gardening] Add missing "clone TSC" step to bootstrap instructions and reformat existing steps#3598

tomerd merged 1 commit intoswiftlang:mainswiftlang/swift-package-manager:mainfrom

WowbaggersLiquidLunch:update-bootstrap-instructionsWowbaggersLiquidLunch/swift-package-manager:update-bootstrap-instructionsCopy head branch name to clipboard