fix(ch19): use id_variable in listing 19-29

listings/ch19-patterns-and-matching/listing-19-29/src/main.rs

@@ -7,8 +7,10 @@ fn main() {
     let msg = Message::Hello { id: 5 };
 
     match msg {
-        Message::Hello { id: id @ 3..=7 } => {
-            println!("Found an id in range: {id}")
+        Message::Hello {
+            id: id_variable @ 3..=7,
+        } => {
+            println!("Found an id in range: {id_variable}")
         }
         Message::Hello { id: 10..=12 } => {
             println!("Found an id in another range")