Update Tile.md

caffe2fluid/doc/Tile.md

@@ -16,7 +16,7 @@ layer {
 ```
 
 
-### [paddle.fluid.layers.concat](http://paddlepaddle.org/documentation/docs/zh/1.3/api_cn/layers_cn.html#permalink-70-expand)
+### [paddle.fluid.layers.concat](http://paddlepaddle.org/documentation/docs/zh/1.4/api_cn/layers_cn.html#permalink-219-concat)
 ```python
 paddle.fluid.layers.concat(
     x,