Make the demo notebook more visible in the README (#142)

Co-authored-by: Alan <[email protected]>

README.md

@@ -10,6 +10,8 @@ A sparse autoencoder for mechanistic interpretability research.
 [![Read the Docs
 Here](https://img.shields.io/badge/-Read%20the%20Docs%20Here-blue?style=for-the-badge&logo=Read-the-Docs&logoColor=white&link=https://ai-safety-foundation.github.io/sparse_autoencoder/)](https://ai-safety-foundation.github.io/sparse_autoencoder/)
 
+Train a Sparse Autoencoder [in colab](https://colab.research.google.com/github/ai-safety-foundation/sparse_autoencoder/blob/main/docs/content/demo.ipynb), or install for your project:
+
 ```shell
 pip install sparse_autoencoder
 ```
@@ -47,7 +49,7 @@ keep everything else as is. Every component is fully documented, so it's nice an
 
 ## Demo
 
-Check out the demo notebook for a guide to using this library.
+Check out the demo notebook [docs/content/demo.ipynb](https://github.com/ai-safety-foundation/sparse_autoencoder/blob/main/docs/content/demo.ipynb) for a guide to using this library.
 
 ## Contributing