change to CMakeLists.txt added by mistake in previous commit

dune/python/test/CMakeLists.txt

@@ -9,5 +9,5 @@ dune_add_test(SOURCES test_embed1.cc
               )
 
 add_executable(test_embed2 EXCLUDE_FROM_ALL test_embed2.cc)
-# target_link_libraries(test_embed2 PUBLIC ${DUNE_LIBS} ${Python3_LIBRARIES})
-target_link_libraries(test_embed2 PRIVATE Python3::Python)
+target_link_libraries(test_embed2 PUBLIC ${DUNE_LIBS} ${Python3_LIBRARIES})
+# the following should apparently work but doesn't target_link_libraries(test_embed2 PRIVATE Python3::Python)