CMSSW_13_0_20

Changes since CMSSW_13_0_19:

compare to previous

1. 45241 from @Dominic-Stafford: Herwig LHE matching fix and Matchbox relval for 13_0 generators pdmv upgrade created: 2024-06-17 10:59:01 merged: 2024-07-11 14:25:14

CMSDIST Changes between Tags REL/CMSSW_13_0_19/el8_amd64_gcc11 and REL/CMSSW_13_0_20/el8_amd64_gcc11:

compare to previous

1. 9247 from @Dominic-Stafford: Missing Herwig backports for 13_0 (2023 gen production) created: 2024-06-17 10:54:15 merged: 2024-06-27 20:32:22