program of thought tutorial (#2029)

* program of thought tutorial

* Update mkdocs.yml

Author: arnavsinghvi11

docs/docs/tutorials/index.md

@@ -20,6 +20,7 @@ Welcome to DSPy tutorials! We've organized our tutorials into three main categor
     - [Classification](/tutorials/classification/)
     - [Multi-Hop RAG](/tutorials/multihop_search/)
     - [Privacy-Conscious Delegation](/tutorials/papillon/)
+    - [Program Of Thought](/tutorials/program_of_thought/)
     - [Image Generation Prompt iteration](/tutorials/image_generation_prompting/)
     - [Audio](/tutorials/audio/)