Correct title casing in Model Training Gym index

Author: madeline-underwood

content/learning-paths/mobile-graphics-and-gaming/model-training-gym/_index.md

@@ -1,5 +1,5 @@
 ---
-title: Fine-Tuning Neural Graphics Models with Model Gym
+title: Fine-tuning neural graphics models with Model Gym
 
 minutes_to_complete: 45
 
@@ -53,7 +53,8 @@ further_reading:
 
 
 ### FIXED, DO NOT MODIFY
-weight: 1
-layout: "learningpathall"
-learning_path_main_page: "yes"
+# ================================================================================
+weight: 1                       # _index.md always has weight of 1 to order correctly
+layout: "learningpathall"       # All files under learning paths have this same wrapper
+learning_path_main_page: "yes"  # This should be surfaced when looking for related content. Only set for _index.md of learning path content.
 ---