[PWGJE] Fix int8_t configurables (AliceO2Group#8522)

Author: vkucera

PWGJE/Tasks/bjetTaggingML.cxx

@@ -114,7 +114,7 @@ struct BJetTaggingML {
   Configurable<std::vector<double>> binsPtMl{"binsPtMl", std::vector<double>{5., 1000.}, "pT bin limits for ML application"};
   Configurable<std::vector<int>> cutDirMl{"cutDirMl", std::vector<int>{cuts_ml::CutSmaller, cuts_ml::CutNot}, "Whether to reject score values greater or smaller than the threshold"};
   Configurable<LabeledArray<double>> cutsMl{"cutsMl", {defaultCutsMl[0], 1, 2, {"pT bin 0"}, {"score for default b-jet tagging", "uncer 1"}}, "ML selections per pT bin"};
-  Configurable<int8_t> nClassesMl{"nClassesMl", (int8_t)2, "Number of classes in ML model"};
+  Configurable<int> nClassesMl{"nClassesMl", 2, "Number of classes in ML model"};
   Configurable<std::vector<std::string>> namesInputFeatures{"namesInputFeatures", std::vector<std::string>{"feature1", "feature2"}, "Names of ML model input features"};
 
   Configurable<std::string> ccdbUrl{"ccdbUrl", "http://alice-ccdb.cern.ch", "url of the ccdb repository"};