Fix formatting issues to pass MegaLinter

Author: rashi234

PWGHF/HFL/DataModel/ElectronSelectionTable.h

@@ -22,6 +22,7 @@
 #include <Framework/AnalysisDataModel.h>
 
 #include <cstdint>
+#include <vector>
 
 namespace o2::aod
 {

PWGHF/HFL/TableProducer/electronSelectionWithTpcEmcal.cxx

@@ -46,6 +46,7 @@
 #include <array>
 #include <cmath>
 #include <cstdint>
+#include <vector>
 
 using namespace o2;
 using namespace o2::constants::physics;