Adjust to RNTuple move out of Experimental

Author: pcanal

root/io/hadd/merge_gen_input_tuples.C

@@ -18,7 +18,7 @@ void merge_gen_input_tuples(const char *fname1 = "test_rntuple_input1.root", con
       auto model = RNTupleModel::Create();
       auto fi = model->MakeField<int>("I");
       auto fl = model->MakeField<long>("L");
-      auto opts = RNTupleWriteOptions{};
+      auto opts = ROOT::RNTupleWriteOptions{};
       opts.SetCompression(ROOT::CompressionSettings(ROOT::RCompressionSetting::EAlgorithm::kZSTD, 5));
       auto writer = RNTupleWriter::Recreate(std::move(model), "ntpl", fname1, opts);
       for (int i = 0; i < 1000; ++i) {
@@ -31,7 +31,7 @@ void merge_gen_input_tuples(const char *fname1 = "test_rntuple_input1.root", con
       auto model = RNTupleModel::Create();
       auto fi = model->MakeField<int>("I");
       auto fl = model->MakeField<long>("L");
-      auto opts = RNTupleWriteOptions{};
+      auto opts = ROOT::RNTupleWriteOptions{};
       opts.SetCompression(ROOT::CompressionSettings(ROOT::RCompressionSetting::EAlgorithm::kZLIB, 1));
       auto writer = RNTupleWriter::Recreate(std::move(model), "ntpl", fname2, opts);
       for (int i = 0; i < 100; ++i) {