Update plato2_en_base and plato2_en_large README.md.

modules/text/text_generation/plato2_en_base/README.md

@@ -140,9 +140,9 @@ https://github.com/PaddlePaddle/Knover
 
 ### 依赖
 
-paddlepaddle >= 1.8.2
+1.8.2 <= paddlepaddle < 2.0.0
 
-paddlehub >= 1.7.0
+1.7.0 <= paddlehub < 2.0.0
 
 
 ## 更新历史

modules/text/text_generation/plato2_en_large/README.md

@@ -142,9 +142,9 @@ https://github.com/PaddlePaddle/Knover
 
 ### 依赖
 
-paddlepaddle >= 1.8.2
+1.8.2 <= paddlepaddle < 2.0.0
 
-paddlehub >= 1.7.0
+1.7.0 <= paddlehub < 2.0.0
 
 
 ## 更新历史