Feedback for “❓ Why Rig?”

It seems like chapter #3 code and response example do not match each other:

```
3. Powerful Abstractions for Agents and RAG Systems

...

println!("Most relevant document: {:?}", results[0].2);

```

and then below:

```
Running this code will produce output similar to:

> RAG Agent Response: Rust's first stable release (1.0) was on May 15, 2015.
```