Correction to wording, call out license.

README.md

@@ -26,4 +26,6 @@ task_categories:
 
 This dataset is [timdettmers/openassistant-guanaco](https://huggingface.co/datasets/timdettmers/openassistant-guanaco) converted to what I believe 
 to be the Llama 2 prompt format (based on [this Reddit post](https://www.reddit.com/r/LocalLLaMA/comments/155po2p/get_llama_2_prompt_format_right/)).
-It is otherwise completely unchanged, and has exactly the same prompts as the original.  
+It is otherwise unchanged.  
+
+The license is the same as the original, Apache 2.0.