benchmark: use non-deprecated WriteUtf8V2 method

PR-URL: #60173
Reviewed-By: Chengzhong Wu <legendecas@gmail.com>
Reviewed-By: Vinícius Lourenço Claro Cardoso <contact@viniciusl.com.br>
Reviewed-By: Richard Lau <richard.lau@ibm.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Rafael Gonzaga <rafael.nunu@hotmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>

Author: targos

benchmark/napi/function_args/binding.cc

@@ -23,7 +23,8 @@ void CallWithString(const FunctionCallbackInfo<Value>& args) {
     Local<String> str = args[0].As<String>();
     const size_t length = str->Utf8LengthV2(args.GetIsolate()) + 1;
     char* buf = new char[length];
-    str->WriteUtf8(args.GetIsolate(), buf, length);
+    str->WriteUtf8V2(
+        args.GetIsolate(), buf, length, String::WriteFlags::kNullTerminate);
     delete[] buf;
   }
 }