Update _index.md

Author: pareenaverma

content/learning-paths/mobile-graphics-and-gaming/ai-plank-tutor/_index.md

@@ -1,6 +1,10 @@
 ---
 title: Build an on-device AI Plank Tutor on Android
 
+draft: true
+cascade:
+    draft: true
+    
 minutes_to_complete: 90
 
 who_is_this_for: This Learning Path is for Android developers who want to explore creating an ML/GenAI pipeline, including camera input, local LLM inference, and speech.
@@ -67,4 +71,4 @@ further_reading:
 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.
----
+---