Update README.md

Co-authored-by: Adam Gleave <adam@gleave.me>

Author: ernestum

README.md

@@ -30,7 +30,7 @@ You can find [the documentation here](https://imitation.readthedocs.io/en/latest
 - (Optional) OpenGL (to render Gymnasium environments)
 - (Optional) FFmpeg (to encode videos of renders)
 
-> Note: `imitation` is only compatible with newer [gymnasium](https://gymnasium.farama.org/) environment API and does not support the older `gym` API.
+> Note: `imitation` is only compatible with the newer [gymnasium](https://gymnasium.farama.org/) environment API and does not support the older `gym` API.
 
 ### Installing PyPI release