[PWGDQ] Add mult variables to the varNames map (#18351)

Author: sigurdnese

PWGDQ/Core/VarManager.cxx

@@ -2202,6 +2202,9 @@ void VarManager::SetDefaultVarNames()
   fgVarNamesMap["kMCEventImpParam"] = kMCEventImpParam;
   fgVarNamesMap["kMCEventPlaneAngle"] = kMCEventPlaneAngle;
   fgVarNamesMap["kMCEventCentrFT0C"] = kMCEventCentrFT0C;
+  fgVarNamesMap["kMultMCNParticlesEta05"] = kMultMCNParticlesEta05;
+  fgVarNamesMap["kMultMCNParticlesEta08"] = kMultMCNParticlesEta08;
+  fgVarNamesMap["kMultMCNParticlesEta10"] = kMultMCNParticlesEta10;
   fgVarNamesMap["kQ1ZNAX"] = kQ1ZNAX;
   fgVarNamesMap["kQ1ZNAY"] = kQ1ZNAY;
   fgVarNamesMap["kQ1ZNCX"] = kQ1ZNCX;