Card: link to the in-browser demo (Try Proofbird Grammar)

README.md

@@ -30,7 +30,7 @@ tagger only proposes local edits; it never paraphrases.
 
 ## Quick start
 
-[![Open in Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/#fileId=https%3A//huggingface.co/proofbird/gector-bert-de/blob/main/quickstart.ipynb)
+[![Open in Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/#fileId=https%3A//huggingface.co/proofbird/gector-bert-de/blob/main/quickstart.ipynb) · [Try it in your browser](https://huggingface.co/spaces/proofbird/try-grammar)
 
 No API key, no GPU. One file, [`quickstart.py`](quickstart.py), downloads the model and runs it with ONNX Runtime.