Update scala-library to 2.12.21 in series/0.24#484

http4s-steward[bot] wants to merge 1 commit intoseries/0.24http4s/http4s-tomcat:series/0.24from

update/series/0.24/scala-library-2.12.21http4s/http4s-tomcat:update/series/0.24/scala-library-2.12.21Copy head branch name to clipboard