Bump golang from 1.19-bullseye to 1.21-bullseye in /cmd/tracker#261

dependabot[bot] wants to merge 1 commit intomainarmingerten/hub:mainfrom

dependabot/docker/cmd/tracker/golang-1.21-bullseyearmingerten/hub:dependabot/docker/cmd/tracker/golang-1.21-bullseyeCopy head branch name to clipboard