SWDEV-448163 - Fix Doxygen warnings

Change-Id: If72e312461a72920b6a482009c9aef4cf92f2e1b


[ROCm/hip-tests commit: 6c23e25c86]

projects/hip-tests/catch/unit/callback/hipKernelNameRef.cc

@@ -69,3 +69,8 @@ TEST_CASE("Unit_hipKernelNameRef_Negative_Parameters") {
   hipFunction_t kernel_function{nullptr};
   REQUIRE(hipKernelNameRef(kernel_function) == nullptr);
 }
+
+/**
+* End doxygen group CallbackTest.
+* @}
+*/