Add Software Bills of Materials in Maven Central to index.md

Author: yogyagamage

index.md

@@ -69,7 +69,7 @@ To get notified about project news, subscribe to the [Chains mailing list](https
   - [Dirty-Waters: Detecting Software Supply Chain Smells](https://arxiv.org/abs/2410.16049), arXiv 2024.
   - [Code-Reuse Attacks in Managed Programming Languages and Runtimes](https://www.diva-portal.org/smash/get/diva2:1905323/SUMMARY01.pdf), PhD Thesis Mikhail Shcherbakov, 2024
 * 2025
-
+  - [Software Bills of Materials in Maven Central](https://arxiv.org/abs/2501.13832), arXiv 2025.
 ## Repositories
 
 See [https://github.com/chains-project/](https://github.com/orgs/chains-project/repositories?type=source)