SWDEV-448163 - Fix Doxygen warnings

Change-Id: If72e312461a72920b6a482009c9aef4cf92f2e1b


[ROCm/hip-tests commit: 6c23e25c86]

projects/hip-tests/catch/unit/graph/hipGraphAddMemFreeNode.cc

@@ -190,3 +190,8 @@ TEST_CASE("Unit_hipGraphAddMemFreeNode_Negative_NotSupported") {
   HIP_CHECK(hipGraphDestroy(graph1));
   HIP_CHECK(hipGraphDestroy(graph2));
 }
+
+/**
+* End doxygen group GraphTest.
+* @}
+*/