build: Bump github.com/lucas-clemente/quic-go from 0.19.3 to 0.21.0#5

dependabot[bot] wants to merge 1 commit intomainbt90/syncthing:mainfrom

dependabot/go_modules/github.com/lucas-clemente/quic-go-0.21.0bt90/syncthing:dependabot/go_modules/github.com/lucas-clemente/quic-go-0.21.0Copy head branch name to clipboard