Update generic_enumerable_generator.cpp

Author: gammasoft71

examples/xtd.core.examples/generic_collections/generic_enumerable_generator/src/generic_enumerable_generator.cpp

@@ -1,6 +1,6 @@
 #include <xtd/xtd>
 
-auto odd_numbers_generator(int count = 100, int min_value = 0, int max_value = 100) -> enumerable_generator<int> {
+[[nodiscard]] auto odd_numbers_generator(int count = 100, int min_value = 0, int max_value = 100) -> enumerable_generator<int> {
   auto rnd = xtd::random();
   for (auto index = 0; index <= count; ++index)
     co_yield rnd.next(min_value, max_value) | 1;