fix copy paste error in sub

Author: t4c1

SYCL/AtomicRef/sub.h

@@ -255,7 +255,7 @@ void sub_test(queue q, size_t N) {
     if constexpr (do_ext_tests) {
       sub_fetch_test<::sycl::ext::oneapi::atomic_ref, space, T, Difference,
                      order, scope>(q, N);
-      sub_plus_equal_test<::sycl::ext::oneapi::atomic_ref, space, T, Difference,
+      sub_minus_equal_test<::sycl::ext::oneapi::atomic_ref, space, T, Difference,
                           order, scope>(q, N);
       if constexpr (!std::is_floating_point_v<T>) {
         sub_pre_dec_test<::sycl::ext::oneapi::atomic_ref, space, T, Difference,
@@ -266,7 +266,7 @@ void sub_test(queue q, size_t N) {
     }
     sub_fetch_test<::sycl::atomic_ref, space, T, Difference, order, scope>(q,
                                                                            N);
-    sub_plus_equal_test<::sycl::atomic_ref, space, T, Difference, order, scope>(
+    sub_minus_equal_test<::sycl::atomic_ref, space, T, Difference, order, scope>(
         q, N);
     if constexpr (!std::is_floating_point_v<T>) {
       sub_pre_dec_test<::sycl::atomic_ref, space, T, Difference, order, scope>(