Update README.MD

Author: ChileWang0228

chapter8/README.MD

@@ -21,7 +21,8 @@
   * BERT + BILSTM + CRF
   * BERT + IDCNN + CRF
   * 动态权重BERT + IDCNN + CRF 
-  * 动态权重BERT + BILSTM + CRF
+  * 动态权重BERT + BILSTM + CRF  
+  
   ![image](https://github.com/ChileWang0228/Deep-Learning-With-Python/blob/master/chapter8/images/BILSTM.png)
   ![image](https://github.com/ChileWang0228/Deep-Learning-With-Python/blob/master/chapter8/images/IDCNN.png)
   ![image](https://github.com/ChileWang0228/Deep-Learning-With-Python/blob/master/chapter8/images/%E5%8A%A8%E6%80%81%E6%9D%83%E9%87%8D%E8%9E%8D%E5%90%88.png)