update HiggsMCsamples config
This is to update the HiggsMCsamples config file to add the STXS information in the EFT ggF sample for this JIRA ticket: https://its.cern.ch/jira/browse/HGAMSW-1006
This is to update the HiggsMCsamples config file to add the STXS information in the EFT ggF sample for this JIRA ticket: https://its.cern.ch/jira/browse/HGAMSW-1006