Fix match range pattern usage

Author: agaskell

src/flow_control/match.md

@@ -15,7 +15,7 @@ fn main() {
         // Match several values
         2 | 3 | 5 | 7 | 11 => println!("This is a prime"),
         // Match an inclusive range
-        13...19 => println!("A teen"),
+        13..=19 => println!("A teen"),
         // Handle the rest of cases
         _ => println!("Ain't special"),
     }
@@ -31,4 +31,4 @@ fn main() {
 
     println!("{} -> {}", boolean, binary);
 }
-```
+```