Update README.md

cookbook/pocketflow-llm-streaming/README.md

@@ -2,6 +2,8 @@
 
 Demonstrates real-time LLM response streaming with user interrupt capability.
 
+- Check out the [Substack Post Tutorial](https://zacharyhuang.substack.com/p/text-to-sql-from-scratch-tutorial) for more!
+
 ## Features
 
 - Real-time display of LLM responses as they're generated
@@ -43,4 +45,4 @@ export OPENAI_API_KEY="your-api-key-here"
 
 - `main.py`: StreamNode implementation
 - `utils.py`: Real and fake LLM streaming functions
- 
+