Update README.md

README.md

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 |2580|UIUC-RAGents|Eric Modesitt, Ke Yang, Chengxiang Zhai|[TinyUPR: Budget Constrained Query Likelihood Reranking for the SIGIR 2025 LiveRAG Challenge](SIGIR_2025_LiveRAG-Workshop_2580.pdf)
 |2591|Ragmatazz|Matthias Krüger, David Fisher, Scott Stults|[Ragmatazz at SIGIR 2025 LiveRAG Challenge](SIGIR_2025_LiveRAG-Workshop_2591.pdf)|
 |2617|BagBag|Shuailong Sang, Yourui Ye, Shimao Chu, Kun Zhang|[A multi-stage hybrid retrieval augment generation system](SIGIR_2025_LiveRAG-Workshop_2517.pdf)|
-|2635|UiS-IAI|Weronika Lajewska, Ivica Kostric, Gabriel Iturra-Bocaz, Mariam Arustashvili, Krisztian Balog|[UiS-IAI@LiveRAG: Retrieval-Augmented Information Nugget-Based Generation of Responses](https://arxiv.org/abs/2506.22210)|
+|2635|UiS-IAI|Weronika Łajewska, Ivica Kostric, Gabriel Iturra-Bocaz, Mariam Arustashvili, Krisztian Balog|[UiS-IAI@LiveRAG: Retrieval-Augmented Information Nugget-Based Generation of Responses](https://arxiv.org/abs/2506.22210)|
 |2650|RAGentA|Ines Besrour, Jingbo He, Tobias Schreieder, Michael Färber|[RAGentA: Multi-Agent Retrieval-Augmented Generation for Attributed Question Answering](https://arxiv.org/abs/2506.16988)|
+|2660|Starlight|To Eun Kim, Fernando Diaz|[LTRR: Learning To Rank Retrievers for LLMs](https://arxiv.org/abs/2506.13743)|
 |2664|emorag|Chase Fensore, Kaustubh Dhole, Joyce Ho, Eugene Agichtein|[Evaluating Hybrid Retrieval Augmented Generation using Dynamic Test Sets: LiveRAG Challenge](SIGIR_2025_LiveRAG-Workshop_2664.pdf)|
 |2671|Graph-Enhanced RAG|Zhili Shen, Chenxin Diao, Pascual Merita, Pavlos Vougiouklis, Jeff Pan|[Millions of GeAR-s: Extending GraphRAG to Millions of Documents](SIGIR_2025_LiveRAG-Workshop_2671.pdf)|