Reveal T4 in the mkdocs

Author: mmalkindi

mkdocs.yml

@@ -56,7 +56,7 @@ nav:
     - Tutorial 1 - Game Design Workshop: tutorials/tutorial-1/README.md
     - Tutorial 2 - Introduction to Game Engine: tutorials/tutorial-2/README.md
     - Tutorial 3 - Introduction to Game Programming: tutorials/tutorial-3/README.md
-    # - Tutorial 4 - Basic 2D Level Design: tutorials/tutorial-4/README.md
+    - Tutorial 4 - Basic 2D Level Design: tutorials/tutorial-4/README.md
     # - Tutorial 5 - Assets Creation & Integration: tutorials/tutorial-5/README.md
     # - Tutorial 6 - Menu & In-Game GUI: tutorials/tutorial-6/README.md
     # - Tutorial 7 - Basic 3D Game Mechanics & Level Design: tutorials/tutorial-7/README.md