Update the variables' name from checkPdgQuarkOne to checkPdgQuark

Author: wuctlby

MC/config/PWGHF/ini/tests/GeneratorHF_D2H_ccbar_Mode2_OmegaC_NoDecay_pp_ref.C

@@ -1,7 +1,7 @@
 int External() {
     std::string path{"o2sim_Kine.root"};
 
-    int checkPdgQuarkOne = 4;
+    int checkPdgQuark{4};
 
     int checkPdgHadron{4332};
     int checkHadronDecays{0};

MC/config/PWGHF/ini/tests/GeneratorHF_D2H_ccbar_Mode2_XiC_NoDecay.C

@@ -1,7 +1,7 @@
 int External() {
     std::string path{"o2sim_Kine.root"};
 
-    int checkPdgQuarkOne = 4;
+    int checkPdgQuark{4};
 
     int checkPdgHadron{4132};
     int checkHadronDecays{0};

MC/config/PWGHF/ini/tests/GeneratorHF_D2H_ccbar_Mode2_XiC_NoDecay_pp_ref.C

@@ -1,7 +1,7 @@
 int External() {
     std::string path{"o2sim_Kine.root"};
 
-    int checkPdgQuarkOne = 4;
+    int checkPdgQuark{4};
 
     int checkPdgHadron{4132};
     int checkHadronDecays{0};

MC/config/PWGHF/ini/tests/GeneratorHF_D2H_ccbar_Mode2_XiCplus_NoDecay_pp_ref.C

@@ -1,7 +1,7 @@
 int External() {
     std::string path{"o2sim_Kine.root"};
 
-    int checkPdgQuarkOne = 4;
+    int checkPdgQuark{4};
 
     int checkPdgHadron{4232};
     int checkHadronDecays{0};