add ruler citation

Signed-off-by: Yotam-Perlitz <y.perlitz@ibm.com>

app.py

@@ -455,6 +455,13 @@ with right:
         primaryClass={cs.CL},
         url={https://arxiv.org/abs/2407.13696}, 
     }
+
+    @article{hsieh2024ruler,
+        title={RULER: What's the Real Context Size of Your Long-Context Language Models?},
+        author={Cheng-Ping Hsieh and Simeng Sun and Samuel Kriman and Shantanu Acharya and Dima Rekesh and Fei Jia and Yang Zhang and Boris Ginsburg},
+        year={2024},
+        journal={arXiv preprint arXiv:2404.06654},
+    }
         
 
     @misc{berkeley-function-calling-leaderboard,