update kie doc (PaddlePaddle#13799)

docs/ppstructure/model_train/train_kie.en.md

@@ -92,6 +92,8 @@ pip install -r ppstructure/kie/requirements.txt
 pip install paddleocr -U
 ```
 
+NOTE: For KIE tasks, it is necessary to downgrade the Paddle framework version (Paddle<2.6) and the PaddleNLP version (PaddleNLP<2.6).
+
 The visualized results of SER are saved in the `./output` folder by default. Examples of results are as follows.
 
 ![img](https://github.com/PaddlePaddle/PaddleOCR/raw/main/ppstructure/docs/kie/result_ser/zh_val_42_ser.jpg)

docs/ppstructure/model_train/train_kie.md

@@ -91,6 +91,8 @@ pip install -r ppstructure/kie/requirements.txt
 pip install paddleocr -U
 ```
 
+NOTE: 对于KIE任务需要降低Paddle框架版本（Paddle<2.6），和PaddleNLP版本（PaddleNLP<2.6）。
+
 ### 4.2 快速开始
 
 下面XFUND数据集，快速体验SER模型与RE模型。

ppstructure/kie/README.md

@@ -128,6 +128,8 @@ pip install -r ppstructure/kie/requirements.txt
 pip install paddleocr -U
 ```
 
+NOTE: For KIE tasks, it is necessary to downgrade the Paddle framework version (Paddle<2.6) and the PaddleNLP version (PaddleNLP<2.6).
+
 The visualized results of SER are saved in the `./output` folder by default. Examples of results are as follows.
 
 

ppstructure/kie/README_ch.md

@@ -122,6 +122,8 @@ pip install -r ppstructure/kie/requirements.txt
 pip install paddleocr -U
 ```
 
+NOTE: 对于KIE任务需要降低Paddle框架版本（Paddle<2.6），和PaddleNLP版本（PaddleNLP<2.6）。
+
 ### 4.2 快速开始
 
 下面XFUND数据集，快速体验SER模型与RE模型。

ppstructure/kie/requirements.txt

@@ -4,4 +4,4 @@ seqeval
 pypandoc
 attrdict3
 python_docx
-paddlenlp>=2.5.2
+paddlenlp==2.5.2