GDScript: Fix type name on error message for function parameters

modules/gdscript/gdscript_parser.cpp

@@ -7872,7 +7872,7 @@ void GDScriptParser::_check_function_types(FunctionNode *p_function) {
 				if (!_is_type_compatible(p_function->argument_types[i], def_type, true)) {
 					String arg_name = p_function->arguments[i];
 					_set_error("Value type (" + def_type.to_string() + ") doesn't match the type of argument '" +
-									   arg_name + "' (" + p_function->arguments[i] + ").",
+									   arg_name + "' (" + p_function->argument_types[i].to_string() + ").",
 							p_function->line);
 				}
 			}