Feature(LongLLMLingua): add LongLLMLingua paper link

app.py

@@ -20,6 +20,9 @@ To use it, upload your prompt and set the compression target.
 3. 🤔 Try experimenting with different target compression ratios or other hyperparameters to optimize the performance.
 
 You can check our [repo](https://aka.ms/LLMLingua)!
+
+We also has a work to compress long context scenories, using less cost but even improve the downstream performance, LongLLMLingua.<\br>
+[LongLLMLingua: Accelerating and Enhancing LLMs in Long Context Scenarios via Prompt Compression](https://arxiv.org/abs/2310.06839) (Under Review).<br>
 """
 
 INTRO_EXAMPLES = '''