add comfyui registry badge

Author: Laurent

README.md

@@ -26,6 +26,7 @@ ______________________________________________________________________
 [![Discord](https://img.shields.io/discord/1179456777406922913?logo=discord&logoColor=white&color=%235765F2)](https://discord.gg/mCmjNUVV7d)
 [![HuggingFace - Refiners](https://img.shields.io/badge/refiners-ffd21e?logo=huggingface&labelColor=555)](https://huggingface.co/refiners)
 [![HuggingFace - Finegrain](https://img.shields.io/badge/finegrain-ffd21e?logo=huggingface&labelColor=555)](https://huggingface.co/finegrain)
+[![ComfyUI Registry](https://img.shields.io/badge/ComfyUI_Registry-comfyui--refiners-1a56db)](https://registry.comfy.org/publishers/finegrain/nodes/comfyui-refiners)
 
 </div>