fix: add missing arg

src/main.rs

@@ -8,7 +8,7 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
     let mut ai = ThebAI::new(None);
     
 
-    let mut response = ai.ask("Hello, world!", /* Option<String> */).await?;
+    let mut response = ai.ask("Hello, world!", None).await?;
 
 
     println!("{:?}", response);