Linked QtCharts to ACG_tests try2

libs_required/ACG/CMakeLists.txt

@@ -438,7 +438,7 @@ if ( ACG_BUILD_UNIT_TESTS )
   )
 
   target_link_libraries(ACG_tests
-    GTest::gtest GTest::gtest_main ${OPENMESH_LIBRARIES} ACG ${GLEW_TARGET} QChart
+    GTest::gtest GTest::gtest_main ${OPENMESH_LIBRARIES} ACG ${GLEW_TARGET} Qt6::Charts
   )
 
   add_test(NAME AllTestsIn_ACG_tests COMMAND ${OUT_DIR}/ACG_tests)