Update README.md

Author: GeorgeTsoukalas

README.md

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     <a href="https://arxiv.org/abs/2407.11214"><img src="https://img.shields.io/badge/arXiv-2407.11214-b31b1b.svg"></a>
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-PutnamBench is a benchmark for evaluation of theorem-proving algorithms on competition mathematics problems sourced from the William Lowell Putnam Mathematical Competition years 1962 - 2024. Our formalizations currently support three formal languages : Lean 4 $\land$ Isabelle $\land$ Coq. PutnamBench comprises of 1724 manually-crafted formalizations, aggregated over all languages.
+PutnamBench is a benchmark for evaluation of theorem-proving algorithms on competition mathematics problems sourced from the William Lowell Putnam Mathematical Competition years 1962 - 2025. Our formalizations currently support three formal languages : Lean 4 $\land$ Isabelle $\land$ Coq. PutnamBench comprises of 1724 manually-crafted formalizations, aggregated over all languages.
 
 PutnamBench aims to support research in automated mathematical reasoning by providing a multilingual benchmark for evaluating theorem-proving algorithms. It is released under permissive licenses (Apache 2.0 for Lean 4 and Isabelle, MIT for Coq). The [informal statements](informal/README.md) are also available with permission from the MAA.