add link to 3D Slicer plugin

README.md

@@ -23,6 +23,7 @@ tags:
 [![GitHub](https://img.shields.io/badge/GitHub-VoxTell-181717?logo=github&logoColor=white)](https://github.com/MIC-DKFZ/VoxTell) 
 [![Hugging Face](https://img.shields.io/badge/%F0%9F%A4%97%20Model-VoxTell-yellow)](https://huggingface.co/MIC-DKFZ/VoxTell) 
 [![web tool](https://img.shields.io/badge/web-tool-4CAF50)](https://github.com/gomesgustavoo/voxtell-web-plugin) 
+[![3D Slicer](https://img.shields.io/badge/3D%20Slicer-plugin-1f65b0)](https://github.com/lassoan/SlicerVoxTell) 
 [![napari](https://img.shields.io/badge/napari-plugin-80d1ff)](https://github.com/MIC-DKFZ/napari-voxtell) 
 
 </div>