update test

Author: Vahid Tavanashad

dpnp/tests/test_window.py

@@ -70,7 +70,7 @@ def test_kaiser_M(self, M):
             M = M.asnumpy()
         expected = numpy.kaiser(M, 14)
 
-        assert_allclose(result, expected, rtol=1e-6)
+        assert_allclose(result, expected, rtol=1e-6, atol=1e-6)
 
     @pytest.mark.filterwarnings("ignore::RuntimeWarning")
     @pytest.mark.parametrize(