Update _toc.yml

Author: ebatty

_toc.yml

@@ -85,7 +85,7 @@ parts:
       - file: Week10/Video102.ipynb
       - file: Week10/Video103.ipynb 
       - file: Week10/Week10Tutorial1.ipynb 
-  #     - file: Week10/Week10Tutorial2.ipynb 
+      - file: Week10/Week10Tutorial2.ipynb 
   #   - file: Week11/Overview.md
   #     sections:
   #     - file: Week11/Video111.ipynb