Skip newaxis test for numpy 1.26.2

Author: jakevdp

numpy-skips.txt

@@ -9,6 +9,9 @@ array_api_tests/test_linalg.py::test_trace
 # https://github.com/numpy/numpy/issues/20326#issuecomment-1012380448
 array_api_tests/test_set_functions.py
 
+# newaxis not included in numpy namespace as of v1.26.2
+array_api_tests/test_constants.py::test_newaxis
+
 # https://github.com/numpy/numpy/issues/21373
 array_api_tests/test_array_object.py::test_getitem