update install dependencies

README.md

@@ -25,7 +25,8 @@ We release our model weights and provide an example below to run our model . Det
 
 **Install dependencies**
 ```bash
-!pip install -q transformers pillow accelerate einops
+!pip install -q transformers # latest version is ok, but we recommend v4.31.0
+!pip install -q pillow accelerate einops
 ```
 
 You can use the following code for model inference. The format of text instruction is similar to [LLaVA](https://github.com/haotian-liu/LLaVA).