Adjusted test per change in implementation

Author: oleksandr-pavlyk

dpctl/tests/test_usm_ndarray_dlpack.py

@@ -709,8 +709,10 @@ def test_copy_via_host():
     assert y.usm_type == "device"
 
     with pytest.raises(ValueError):
+        # uncorrect length of tuple
         dpt.from_dlpack(x_np, device=(1, 0, 0))
-    with pytest.raises(BufferError):
+    with pytest.raises(ValueError):
+        # only kDLCPU and kDLOneAPI are supported
         dpt.from_dlpack(x, device=(2, 0))
 
     num_devs = dpctl.get_num_devices()