JO revision to shower MC23 HZy LHE files without Dalitz decay [skip modfiles]

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JIRA ticket

ATLMCPROD-11301

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602xxx/602893/mc.PhPy8EG_PDF4LHC21_ZH125J_Zincl_MINLO_Zllgamma.py

@@ -26,6 +26,8 @@ genSeq.Pythia8.Commands += [ '25:onMode = off', # decay of Higgs
                              '23:onIfMatch = 11 11',
                              '23:onIfMatch = 13 13',
                              '23:onIfMatch = 15 15' ] 
+
+genSeq.Pythia8.Commands += ["TimeShower:QEDshowerByGamma = off"]
 #--------------------------------------------------------------
 # EVGEN configuration
 #--------------------------------------------------------------