Wfa change get rms

Updates to the GetRMS() function in WFAnalysis.cpp and changed smoothing parameter for zdc in AnalysisExample2021.cpp from 30 to 20.

Analysis/src/WFAnalysis.cpp

@@ -329,7 +329,7 @@ double WFAnalysis::GetRMS( Channel* Ch ){
 
     hDiffHisto->Reset();
     hDiffHisto->ResetStats();
-    hDiffHisto->SetBins( (xmax - xmin)/12, xmin, xmax);
+    hDiffHisto->SetBins( (xmax - xmin)/36, xmin/3, xmax/3);
 
     //Loop over the histogram excluding the window used for differentiating to fill hRMS
     Int_t nbins = Ch->FirstDerivative->GetNbinsX();