optimize maixcam model convert tool doc

Author: Neutree

docs/doc/en/ai_model_converter/maixcam.md

@@ -101,7 +101,7 @@ Download the `whl` file from [GitHub](https://github.com/sophgo/tpu-mlir/release
 pip install tpu_mlir*.whl # Replace with the downloaded file name
 ```
 
-Running `model_transform.py` should display help information, indicating a successful installation.
+Type `model_transform.py` end with Enter key in container should display help information, indicating a successful installation.
 
 ## Writing the Conversion Script
 

docs/doc/zh/ai_model_converter/maixcam.md

@@ -113,7 +113,7 @@ docker run --privileged --name tpu-env -v /home/$USER/data:/home/$USER/data -it
 pip install tpu_mlir*.whl # 这里就是下载文件的名字
 ```
 
-执行`model_transform.py` 会有打印帮助信息就算是安装成功了。
+在容器内**直接输入**`model_transform.py`回车执行会有打印帮助信息就算是安装成功了。
 
 ## 编写转换脚本