Update README.md

README.md

@@ -29,13 +29,13 @@ Assistant: response 2<eos_token>
 - **Finetuned from model:** LLaMA-13b
 - **Finetuned on data:** [UltraChat](https://github.com/thunlp/UltraChat)
 
-### Model Sources [optional]
+### Model Sources
 
 <!-- Provide the basic links for the model. -->
 
 - **Repository:** [UltraChat](https://github.com/thunlp/UltraChat)
-- **Paper [optional]:** [arxiv](https://arxiv.org/abs/2305.14233)
-- **Demo [optional]:** [More Information Needed]
+- **Paper:** [arxiv](https://arxiv.org/abs/2305.14233)
+- **Demo:** [More Information Needed]
 
 ## Uses