Fix TOF geometry in mCBM 2019 03 setup by reverting to right tag value

setup/setup_mcbm_beam_2019_03.C

@@ -7,6 +7,7 @@
  **
  **/
 
+// 2023-07-05 - PAL- Restore usage of proper TOF geometry (v18m removed years ago)
 // 2020-05-22 - DE - use platform v20a with measured size of support table
 // 2020-04-08 - FU - use sts, tof and rich geometries with exported volumes
 // 2019-08-15 - DE - use mCBM targetbox as pipe v19b
@@ -51,8 +52,7 @@ void setup_mcbm_beam_2019_03()
   TString muchGeoTag      = "v19a_mcbm";    // 2018 // only 2 layers
   //  TString trdGeoTag       = "v18n_mcbm";    // 2018 // 4 TRD modules
   TString trdGeoTag       = "v18q_mcbm";    // 2018 // 2 TRD modules
-  TString tofGeoTag       = "v18m_mcbm";    // geometry provided by TOF  group
-  //TString tofGeoTag       = "v19d_mcbm";    // geometry provided by TOF  group
+  TString tofGeoTag       = "v19d_mcbm";    // geometry provided by TOF  group
   TString richGeoTag      = "v19d_mcbm";    // geometry provided by RICH group
   //  TString richGeoTag      = "v18h_mcbm";    // long distance
 //  TString psdGeoTag       = "v18d_mcbm";    // at 25 degree, below the beampipe