Add experimental folder to README (#585)

recipes/README.md

+## Llama-Recipes
+
 This folder contains examples organized by topic:
 
 | Subfolder | Description |
 |---|---|
 [quickstart](./quickstart)|The "Hello World" of using Llama 3, start here if you are new to using Llama 3
 [use_cases](./use_cases)|Scripts showing common applications of Llama 3
-[3p_integrations](./3p_integrations)|Partner owned folder showing common applications of Meta Llama3
+[3p_integrations](./3p_integrations)|Partner-owned folder showing Meta Llama 3 usage along with third-party tools 
 [responsible_ai](./responsible_ai)|Scripts to use PurpleLlama for safeguarding model outputs
+[experimental]|Meta Llama implementations of experimental LLM techniques