SWDEV-448163 - Fix Doxygen warnings

Change-Id: If72e312461a72920b6a482009c9aef4cf92f2e1b

catch/unit/graph/hipGraphAddKernelNode.cc

@@ -464,3 +464,8 @@ TEST_CASE("Unit_hipGraphAddKernelNode_moduleLoadKernelFn_streamCapture") {
 }
 #endif
 
+
+/**
+* End doxygen group GraphTest.
+* @}
+*/