!1043 FIxed a simple question

Merge pull request !1043 from zhangzheng/simple

mindspore/nn/wrap/loss_scale.py

@@ -187,7 +187,7 @@ class TrainOneStepWithLossScaleCell(Cell):
     Examples:
         >>> net_with_loss = Net()
         >>> optimizer = nn.Momentum(net_with_loss.trainable_params(), learning_rate=0.1, momentum=0.9)
-        >>> manager = nn.DynamicLossScaleUpdateCell(init_loss_scale=2**12, scale_factor=2, scale_window=1000)
+        >>> manager = nn.DynamicLossScaleUpdateCell(loss_scale_value=2**12, scale_factor=2, scale_window=1000)
         >>> train_network = nn.TrainOneStepWithLossScaleCell(net_with_loss, optimizer, scale_update_cell=manager)
         >>> train_network.set_train()
         >>>