[Trigger,PWGHF] Small fix to QA output (#15931)

Author: fgrosa

EventFiltering/PWGHF/HFFilter.cxx

@@ -492,6 +492,7 @@ struct HfFilter { // Main struct for HF triggers
       bool isSelectedPvZ = (std::fabs(collision.posZ()) < evSel.maxPvZ);
       if (!isSelectedTVX || !isSelectedTFBorder || !isSelectedITSROFBorder || !isSelectedPvZ) {
         tags(keepEvent[kHighPt2P], keepEvent[kHighPt3P], keepEvent[kBeauty3P], keepEvent[kBeauty4P], keepEvent[kFemto2P], keepEvent[kFemto3P], keepEvent[kDoubleCharm2P], keepEvent[kDoubleCharm3P], keepEvent[kDoubleCharmMix], keepEvent[kV0Charm2P], keepEvent[kV0Charm3P], keepEvent[kCharmBarToXiBach], keepEvent[kSigmaCPPK], keepEvent[kSigmaC0K0], keepEvent[kPhotonCharm2P], keepEvent[kPhotonCharm3P], keepEvent[kSingleCharm2P], keepEvent[kSingleCharm3P], keepEvent[kSingleNonPromptCharm2P], keepEvent[kSingleNonPromptCharm3P], keepEvent[kCharmBarToXi2Bach], keepEvent[kPrCharm2P], keepEvent[kBtoJPsiKa], keepEvent[kBtoJPsiKstar], keepEvent[kBtoJPsiPhi], keepEvent[kBtoJPsiPrKa], keepEvent[kBtoJPsiPi], keepEvent[kSigmaCPr]);
+        hProcessedEvents->Fill(1); // rejected
         continue;
       }