Update README.md

Author: migolan

README.md

@@ -2,6 +2,6 @@
 
 Dynasty extracts the class hierachy for your package, to track down lost or misplaced classes and help prevent [ravioli code](https://docs.python-guide.org/writing/structure).
 
-See the [example jupyter notebook](https://github.com/migolan/dynasty/blob/67408b7438f2ba6d55bab72b4d37ba8b61a9f0a6/example.ipynb) for demonstration.
+See the [example jupyter notebook](https://github.com/migolan/dynasty/blob/main/example.ipynb) for demonstration.
 
 Michal Golan mizarrouk@gmail.com [@migolan](https://github.com/migolan)