Update scala-library to 2.12.21 in series/0.25#485

http4s-steward[bot] wants to merge 1 commit intoseries/0.25http4s/http4s-tomcat:series/0.25from

update/series/0.25/scala-library-2.12.21http4s/http4s-tomcat:update/series/0.25/scala-library-2.12.21Copy head branch name to clipboard