[docs] only mention one stage (#3246)

* [docs] only mention one stage

* add blurb on auto accepting

---------

Co-authored-by: William Berman <[email protected]>

Author: pcuenca

docs/source/en/api/pipelines/if.mdx

@@ -28,8 +28,8 @@ Our work underscores the potential of larger UNet architectures in the first sta
 ## Usage
 
 Before you can use IF, you need to accept its usage conditions. To do so:
-1. Make sure to have a [Hugging Face account](https://huggingface.co/join) and be loggin in
-2. Accept the license on the model card of [DeepFloyd/IF-I-IF-v1.0](https://huggingface.co/DeepFloyd/IF-I-IF-v1.0) and [DeepFloyd/IF-II-L-v1.0](https://huggingface.co/DeepFloyd/IF-II-L-v1.0)
+1. Make sure to have a [Hugging Face account](https://huggingface.co/join) and be logged in
+2. Accept the license on the model card of [DeepFloyd/IF-I-IF-v1.0](https://huggingface.co/DeepFloyd/IF-I-IF-v1.0). Accepting the license on the stage I model card will auto accept for the other IF models.
 3. Make sure to login locally. Install `huggingface_hub`
 ```sh
 pip install huggingface_hub --upgrade