Update README.md

Author: jukent

README.md

@@ -51,7 +51,7 @@ and even change the example programs. You’ll see that the code cells
 have no output at first, until you execute them by pressing
 {kbd}`Shift`\+{kbd}`Enter`. Complete details on how to interact with
 a live Jupyter notebook are described in [Getting Started with
-Jupyter](https://foundations.projectpythia.org/foundations/getting-started-jupyter.html).
+Jupyter](https://foundations.projectpythia.org/foundations/getting-started-jupyter).
 
 ### Running on Your Own Machine