[PWGLF] Change TPC nSigma condition to use absolute value (#14041)

Author: jtanwar2212

PWGLF/Tasks/Nuspex/nucleitpcpbpb.cxx

@@ -376,7 +376,7 @@ struct NucleitpcPbPb {
           float tpcNsigma = getTPCnSigma(track, primaryParticles.at(i));
           if ((std::abs(tpcNsigma) > cfgTrackPIDsettings->get(i, "maxTPCnSigma")) && cfgmaxTPCnSigmaRequire)
             continue;
-          if (tpcNsigma > correctionsigma) {
+          if (std::abs(tpcNsigma) > correctionsigma) {
             double a = 0, b = 0, c = 0;
 
             int param = -1;