Update blogs.md Andrea Catelli (numfocus#524)

Author: andreacate

2025/blogs.md

@@ -49,6 +49,8 @@ This page is for the contributor blogs of NumFOCUS, Google Summer of Code 2025.
 
     Michal Novomestsky [Implementing Integrated Nested Laplace Approximations (INLA)](https://michal-novomestsky.github.io/tags/#gsoc)
 
+    Andrea Catelli [Implementing Dynamic Factor Model (DFM)](https://andreacate.github.io/gsoc/)
+
 - [PySAL](https://github.com/pysal/pysal/wiki/Google-Summer-of-Code-2025)
 
     Dylan Skrah [Building a Routing Engine for `spopt`](https://fiendskrah.github.io/gsoc-2025-blog/)