SWDEV-448163 - Fix Doxygen warnings

Change-Id: If72e312461a72920b6a482009c9aef4cf92f2e1b

catch/unit/errorHandling/hipGetErrorString.cc

@@ -72,4 +72,9 @@ TEST_CASE("Unit_hipGetErrorString_Positive_Basic") {
 TEST_CASE("Unit_hipGetErrorString_Negative_Parameters") {
   const char* error_string = hipGetErrorString(static_cast<hipError_t>(-1));
   REQUIRE(error_string != nullptr);
-}
+}
+
+/**
+* End doxygen group ErrorTest.
+* @}
+*/