contains following MRs: https://gitlab.cern.ch/atlas/athena/-/merge_requests/53861 Pythia8 update version to 8.307p1 https://gitlab.cern.ch/atlas/athena/-/merge_requests/53893 TheP8I: update to 2.0.2.thepeg223 version https://gitlab.cern.ch/atlas/athena/-/merge_requests/53969 21.6: LHEFilters updates https://gitlab.cern.ch/atlas/athena/-/merge_requests/54324 Adding copyright to LHEFilters python files, and removing one comment https://gitlab.cern.ch/atlas/athena/-/merge_requests/54488 atlasexternals-1.0.80 update (to include scipy) https://gitlab.cern.ch/atlas/athena/-/merge_requests/54539 PowhegControl update to v.05-04, use scipy https://gitlab.cern.ch/atlas/athena/-/merge_requests/54706 Generators: update Rivet_i README https://gitlab.cern.ch/atlas/athena/-/merge_requests/54865 PowhegControl: Fixing ggF_HH