* Minor update to Readme - Statemint section Common good -> System * update parchains readme * Update parachains/README.md Co-authored-by: Bastian Köcher <git@kchr.de> Co-authored-by: joe petrowski <25483142+joepetrowski@users.noreply.github.com> Co-authored-by: Bastian Köcher <git@kchr.de>