update

Author: mhjensen

doc/LectureNotes/_toc.yml

@@ -58,6 +58,8 @@ parts:
     - file: exercisesweek41.ipynb
     - file: week42.ipynb    
     - file: exercisesweek42.ipynb        
+    - file: week43.ipynb    
+    - file: exercisesweek43.ipynb        
   - caption: Projects
     numbered: false
     chapters: