Fixed link

dabeaz · dabeaz · commit 79d47df60074 · 2020-06-16T14:03:54.000-05:00
diff --git a/Notes/InstructorNotes.md b/Notes/InstructorNotes.md
@@ -334,6 +334,6 @@ Second goal, write a simple setup.py file that they can use to package
 up the code and give it away to someone.  That's it.  End of the
 course.
 
-[Contents](Contents.html)
+[Contents](Contents.md)
 
 
