FT0: corrected macro FT0readEventsPerBc, corrected typo in calibration README

Author: wpierozak

Detectors/FIT/FT0/calibration/README.md

@@ -23,7 +23,7 @@ First, it is important to digitize data with a non-zero run number, orbit, and t
 ```
 o2-sim-digitizer-workflow \
 --onlyDet FT0 \
---configKeyValues="HBFUtils.nHBFPerTF=128;HBFUtils.orbitFirst=128;HBFUtils.orbitFirstSampled=256;HBFUtils.runNumber=560560;HBFUtils.timestamp=1768464099000"
+--configKeyValues="HBFUtils.nHBFPerTF=128;HBFUtils.orbitFirst=128;HBFUtils.orbitFirstSampled=256;HBFUtils.runNumber=560560;HBFUtils.startTime=1768464099000"
 ```
 
 To process simulation data, digits must first be converted to RAW format. The `o2-ft0-digi2raw` tool performs this conversion and generates the required configuration file.

Detectors/FIT/FT0/macros/FT0readEventsPerBc.C

@@ -33,7 +33,7 @@ void FT0readEventsPerBc(std::string ccdbUrl, long timestamp)
   }
 
   hist = std::make_unique<TH1F>("eventsPerBcHist", "Events per BC", o2::constants::lhc::LHCMaxBunches, 0, o2::constants::lhc::LHCMaxBunches - 1);
-  for (int idx = 0; idx < LhcOrbits; idx++) {
+  for (int idx = 0; idx < o2::constants::lhc::LHCMaxBunches; idx++) {
     hist->Fill(idx, (*events)[idx]);
   }
   canvas = std::make_unique<TCanvas>();