SusyNtMaker::computeHiggsPtUncertaintyParameters: pick correct higgs

The instructions for the higgs pt reweighting
https://dgillber.web.cern.ch/dgillber/Higgs_pT_reweigh/ said that I
should pick the higgs with status `62`, which is missing from our lfv
samples because the decay was performed by EvtGen.
Rob confirmed that I shoul pick the one with status `999` instead.