Update README.md

Hi, one of the best practice for our models is to have a license displayed in the metadata of the model. I added one (MIT) but feel free to change to the correct licence.

Thanks 🤗

README.md

@@ -1,3 +1,6 @@
+---
+license: mit
+---
 <!-- markdownlint-disable first-line-h1 -->
 <!-- markdownlint-disable html -->
 <!-- markdownlint-disable no-duplicate-header -->
@@ -92,4 +95,4 @@ If you find this project useful, please cite our paper:
   journal   = {arXiv},
   year      = {2025}
 }
-```
+```