Add reference to demo notebook

README.md

@@ -70,6 +70,9 @@ pip install git+https://huggingface.co/microsoft/colipri.git
 
 ## Usage examples
 
+Below we share some usage snippets to get started with COLIPRI.
+A more complete [Jupyter notebook](./COLIPRI_demo.ipynb) is also available.
+
 First, let's get a 3D chest CT we can use for demonstration.
 The plotted slices intersect a lung nodule near the heart.