Update work_group_memory_forward_decl.hpp

Author: lbushi25

clang/test/SemaSYCL/Inputs/sycl/ext/oneapi/experimental/work_group_memory_forward_decl.hpp

@@ -5,7 +5,7 @@ inline namespace _V1 {
 namespace ext {
 namespace oneapi {
 namespace experimental {
-template <typename DataT, typename PropertiesT = empty_properties_t>
+template <typename DataT, typename PropertiesT = int>
 class work_group_memory;
 } // namespace experimental
 } // namespace oneapi