SWDEV-448163 - Fix Doxygen warnings

Change-Id: If72e312461a72920b6a482009c9aef4cf92f2e1b

catch/unit/graph/hipGraphAddMemcpyNodeToSymbol.cc

@@ -149,3 +149,8 @@ TEST_CASE("Unit_hipGraphAddMemcpyNodeToSymbol_Negative_Parameters") {
 
   HIP_CHECK(hipGraphDestroy(graph));
 }
+
+/**
+* End doxygen group GraphTest.
+* @}
+*/