update readme

Author: liugangcode

README.md

@@ -171,7 +171,7 @@ new_model.load_from_local("qm9_grea.pt")
 
 | Model                | Reference           |
 |----------------------|---------------------|
-| GRIN                 | [Learning Repetition-Invariant Representations for Polymer Informatics. NeurIPS 2025. May 2025](https://arxiv.org/abs/2505.10726) |
+| GRIN                 | [Learning Repetition-Invariant Representations for Polymer Informatics. NeurIPS 2025.](https://arxiv.org/abs/2505.10726) |
 | BFGNN                 | [Graph neural networks extrapolate out-of-distribution for shortest paths. March 2025](https://arxiv.org/abs/2503.19173) |
 | SGIR                 | [Semi-Supervised Graph Imbalanced Regression. KDD 2023](https://dl.acm.org/doi/10.1145/3580305.3599497) |
 | GREA                | [Graph Rationalization with Environment-based Augmentations. KDD 2022](https://dl.acm.org/doi/abs/10.1145/3534678.3539347) |