Update Eltwise.md

caffe2fluid/doc/Eltwise.md

@@ -19,11 +19,11 @@ layer {
 ```
 
 
-### [paddle.fluid.layers.elementwise_sum](http://paddlepaddle.org/documentation/docs/zh/1.3/api_cn/layers_cn.html#permalink-61-elementwise_add)
-### [paddle.fluid.layers.elementwise_max](http://paddlepaddle.org/documentation/docs/zh/1.3/api_cn/layers_cn.html#permalink-63-elementwise_max)
-### [paddle.fluid.layers.elementwise_mul](http://paddlepaddle.org/documentation/docs/zh/1.3/api_cn/layers_cn.html#permalink-65-elementwise_mul)
+### [paddle.fluid.layers.elementwise_add](http://paddlepaddle.org/documentation/docs/zh/1.4/api_cn/layers_cn.html#permalink-61-elementwise_add)
+### [paddle.fluid.layers.elementwise_max](http://paddlepaddle.org/documentation/docs/zh/1.4/api_cn/layers_cn.html#permalink-63-elementwise_max)
+### [paddle.fluid.layers.elementwise_mul](http://paddlepaddle.org/documentation/docs/zh/1.4/api_cn/layers_cn.html#permalink-65-elementwise_mul)
 ```python
-paddle.fluid.layers.elementwise_sum(
+paddle.fluid.layers.elementwise_add(
     x, 
     y, 
     axis=-1,